This document discusses the physical examination of tyre marks in forensic investigations. It describes the different types of tyre marks including yaw marks, scrub marks, and skid marks. It outlines the characteristics and identification process for tyre marks, including width, tread pattern, and circumstances. The document explains that tyre marks can be photographed, casted, or examined at a crime scene and provides their forensic significance in helping to identify vehicles and tracing criminal activity.
VSC VIDEO SPECTRAL COMPARATAOR FORENSIC APPLICATIONS BY SHAILESH CHAUBEY STUDENT OF FORENSIC SCIENCE & CRIMINOLOGY FROM BUNDELKHAND UNIVERSITY JHANSI UTTAR PRADESH INDIA . THIS PPT SHOWS ABOUT THE FEATURES, APPLICATIONS , CASE LAWS & NEED OF VSC IN FORENSIC ASPECTS FOR DOCUMENT EXAMINATION & HANDWRITING . THIS PRESENTATION WILL HELP TO GET MORE INFORMATION ABOUT VSC BY VARIOUS SLIDES.
Fingerprint - Everything You Need To Know About FingerprintsSwaroopSonone
A detailed fingerprint presentation. Fingerprint is one of the most important criminal investigation tools due to their two significant features- uniqueness and persistence. The unique features of friction ridge skin persist from before birth, i.e. during fetal development to the decomposition after death...
age of document , document, paper, writing matter, typescript, printed matter, signature and handwriting, typewriter and various types of type writing devices
A digital imaging instrument manufactured by Foster + Freeman that employs combinations of light sources and filters to examine document evidence under various wavelengths of radiation ranging from ultraviolet to the infrared regions of the electromagnetic spectrum.
VSC is a preferred tool as it supports non destructive examination of documents. VSC uses multiple parameters like IR, UV, and White light providing accurate results.
Introduction:
Tire Impression is 2D or 3D marks that reflects the tread design and dimensional features of a tire.
Tire Track is the Relative dimension between two or more tires of a vehicle
Principle Behind Tire Track:
The basic theory behind Tire Track analysis is the examination by investigators of imprints or impressions left by any vehicle.
The type of Evidence left behind depends largely on the type of travelled surface. For eg. a tire will leave impression on loose sand but on a hard surface like concrete it will leave an imprint.
Tire treads and Sidewall components
In this section, we learn about the different Elements of a tire for the better understanding of tire track or impression or imprints.
This help us to better understanding of a crime scene.
Tire Treads and Sidewall components can also help us to make a correlation with the manufacturer of the tire
Tire treads are ridges and grooves that channel water away from the wheel and provide traction for the vehicle.
i. Tread patterns can be measured and used to identify the type of tire, and sometimes even the make and model of the vehicle that left the mark
Types of Characters:
Class Characteristics:
Class Characteristics are basically a number of similar characteristics that are shared by more than a number of objects.
Eg. Two tires of some brand, model and Size will have identical tread design and dimensions but may have slight differences due to imperfections in moulds used during manufacturing.
Individual Characteristics:
Indivisible Characters are those which are unique to any particular object and doesn’t shared by similar characters with any other of its kind.
Eg. These could be from damage such as cut, crack or a temporary alteration like a stone or twig stuck in tread.
Types of tire marks:
Skids marks
Brakes suddenly
Locked wheels
Calculate velocity from skid marks
Yaw marks
Produced when a vehicle travels in a curved path faster than the vehicle can handle and skids sideways
Tires and road surface melt from extreme temps
Often smoke occurs
Tire scrubs
Damaged or overloaded tires after impact
Usually curved
Determine area of impact
Importance of tire marks:
Tire evidence can be used to link a suspect to a crime scene and also to help the crime scene investigators reconstruct the crime.
Like other impressions, tire marks may leave patent, latent, and plastic markings.
i. Patent impressions occur when a car travels over a liquid such as paint, blood, or tar.
ii. Latent tracks can be deposited from the oil used to soften tires.
iii. Plastic impressions can be made when a vehicle drives on mud, sand, or snow.
To help identify a vehicle, investigators measure track widths, wheelbase lengths, and turning diameter and check them against a vehicle database.
Tire marks can also give clues to speed and direction of the vehicle.
Investigators will use information provided by evidence to try to reconstruct an accident.
VSC VIDEO SPECTRAL COMPARATAOR FORENSIC APPLICATIONS BY SHAILESH CHAUBEY STUDENT OF FORENSIC SCIENCE & CRIMINOLOGY FROM BUNDELKHAND UNIVERSITY JHANSI UTTAR PRADESH INDIA . THIS PPT SHOWS ABOUT THE FEATURES, APPLICATIONS , CASE LAWS & NEED OF VSC IN FORENSIC ASPECTS FOR DOCUMENT EXAMINATION & HANDWRITING . THIS PRESENTATION WILL HELP TO GET MORE INFORMATION ABOUT VSC BY VARIOUS SLIDES.
Fingerprint - Everything You Need To Know About FingerprintsSwaroopSonone
A detailed fingerprint presentation. Fingerprint is one of the most important criminal investigation tools due to their two significant features- uniqueness and persistence. The unique features of friction ridge skin persist from before birth, i.e. during fetal development to the decomposition after death...
age of document , document, paper, writing matter, typescript, printed matter, signature and handwriting, typewriter and various types of type writing devices
A digital imaging instrument manufactured by Foster + Freeman that employs combinations of light sources and filters to examine document evidence under various wavelengths of radiation ranging from ultraviolet to the infrared regions of the electromagnetic spectrum.
VSC is a preferred tool as it supports non destructive examination of documents. VSC uses multiple parameters like IR, UV, and White light providing accurate results.
Introduction:
Tire Impression is 2D or 3D marks that reflects the tread design and dimensional features of a tire.
Tire Track is the Relative dimension between two or more tires of a vehicle
Principle Behind Tire Track:
The basic theory behind Tire Track analysis is the examination by investigators of imprints or impressions left by any vehicle.
The type of Evidence left behind depends largely on the type of travelled surface. For eg. a tire will leave impression on loose sand but on a hard surface like concrete it will leave an imprint.
Tire treads and Sidewall components
In this section, we learn about the different Elements of a tire for the better understanding of tire track or impression or imprints.
This help us to better understanding of a crime scene.
Tire Treads and Sidewall components can also help us to make a correlation with the manufacturer of the tire
Tire treads are ridges and grooves that channel water away from the wheel and provide traction for the vehicle.
i. Tread patterns can be measured and used to identify the type of tire, and sometimes even the make and model of the vehicle that left the mark
Types of Characters:
Class Characteristics:
Class Characteristics are basically a number of similar characteristics that are shared by more than a number of objects.
Eg. Two tires of some brand, model and Size will have identical tread design and dimensions but may have slight differences due to imperfections in moulds used during manufacturing.
Individual Characteristics:
Indivisible Characters are those which are unique to any particular object and doesn’t shared by similar characters with any other of its kind.
Eg. These could be from damage such as cut, crack or a temporary alteration like a stone or twig stuck in tread.
Types of tire marks:
Skids marks
Brakes suddenly
Locked wheels
Calculate velocity from skid marks
Yaw marks
Produced when a vehicle travels in a curved path faster than the vehicle can handle and skids sideways
Tires and road surface melt from extreme temps
Often smoke occurs
Tire scrubs
Damaged or overloaded tires after impact
Usually curved
Determine area of impact
Importance of tire marks:
Tire evidence can be used to link a suspect to a crime scene and also to help the crime scene investigators reconstruct the crime.
Like other impressions, tire marks may leave patent, latent, and plastic markings.
i. Patent impressions occur when a car travels over a liquid such as paint, blood, or tar.
ii. Latent tracks can be deposited from the oil used to soften tires.
iii. Plastic impressions can be made when a vehicle drives on mud, sand, or snow.
To help identify a vehicle, investigators measure track widths, wheelbase lengths, and turning diameter and check them against a vehicle database.
Tire marks can also give clues to speed and direction of the vehicle.
Investigators will use information provided by evidence to try to reconstruct an accident.
There are top of the line one and low-end ones. Beyond any doubt, when you purchase top of the line tires and edges, you must set up a decent plan for that. As a rule, the more strong edges and tires are the ones that cost a higher cost.
Tire rotation is the most important task in a vehicle for managing the tire tread wear and carries your vehicle over rough surfaces. During the tire rotation, each tire of the vehicle is moved to a different location on the car's axle such as moving the front right tires to the back left position. Go through the following slide to know about the basic importance of tire rotation in your vehicle.
When the tires of your car get worn out, replacement is the only solution. But, you should avoid premature damage to the tires. The tires can get irregular wear, sidewall indentation, or cut on the tire surface. To keep your tires safe, you should know about the different types of irregular tire wear found in a car. See this slideshow.
In BMW, the shock absorber is a component that is there in the vehicle’s suspension system to reduce the unwanted impacts of traveling over rough thoroughfare. Also, the role of the shock absorbers in improving handling and ride quality is ultimate. Aggressive driving on bad roads or hitting potholes often can damage the shocks. A damaged shock can cause excessive vibrations in the steering wheel and swerving during the application of brakes. That’s why bad shock absorbers need to be spotted and fixed consulting an authorized car professional.
Paints are very common evidence found in hit and run cases, burglary cases and many other cases. The collection of paint evidence has been explained in this presentation
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
Introduction:
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is an important biological process for modulating eukaryotic gene expression.
It is highly conserved process of posttranscriptional gene silencing by which double stranded RNA (dsRNA) causes sequence-specific degradation of mRNA sequences.
dsRNA-induced gene silencing (RNAi) is reported in a wide range of eukaryotes ranging from worms, insects, mammals and plants.
This process mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
What are small ncRNAs?
micro RNA (miRNA)
short interfering RNA (siRNA)
Properties of small non-coding RNA:
Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
Synthesized by first cutting up longer precursor sequences (like the 61nt one that Lee discovered).
Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
Because lin-4 encoded no protein, she deduced that it must be these transcripts that are causing the silencing by RNA-RNA interactions.
Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
1.PAZ(PIWI/Argonaute/ Zwille)- Recognition of target MRNA
2.PIWI (p-element induced wimpy Testis)- breaks Phosphodiester bond of mRNA.)RNAse H activity.
MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Cancer cell metabolism: special Reference to Lactate PathwayAADYARAJPANDEY1
Normal Cell Metabolism:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function.
Energy is stored in the bonds of glucose and when glucose is broken down, much of that energy is released.
Cell utilize energy in the form of ATP.
The first step of respiration is called glycolysis. In a series of steps, glycolysis breaks glucose into two smaller molecules - a chemical called pyruvate. A small amount of ATP is formed during this process.
Most healthy cells continue the breakdown in a second process, called the Kreb's cycle. The Kreb's cycle allows cells to “burn” the pyruvates made in glycolysis to get more ATP.
The last step in the breakdown of glucose is called oxidative phosphorylation (Ox-Phos).
It takes place in specialized cell structures called mitochondria. This process produces a large amount of ATP. Importantly, cells need oxygen to complete oxidative phosphorylation.
If a cell completes only glycolysis, only 2 molecules of ATP are made per glucose. However, if the cell completes the entire respiration process (glycolysis - Kreb's - oxidative phosphorylation), about 36 molecules of ATP are created, giving it much more energy to use.
IN CANCER CELL:
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
introduction to WARBERG PHENOMENA:
WARBURG EFFECT Usually, cancer cells are highly glycolytic (glucose addiction) and take up more glucose than do normal cells from outside.
Otto Heinrich Warburg (; 8 October 1883 – 1 August 1970) In 1931 was awarded the Nobel Prize in Physiology for his "discovery of the nature and mode of action of the respiratory enzyme.
WARNBURG EFFECT : cancer cells under aerobic (well-oxygenated) conditions to metabolize glucose to lactate (aerobic glycolysis) is known as the Warburg effect. Warburg made the observation that tumor slices consume glucose and secrete lactate at a higher rate than normal tissues.
Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
The increased availability of biomedical data, particularly in the public domain, offers the opportunity to better understand human health and to develop effective therapeutics for a wide range of unmet medical needs. However, data scientists remain stymied by the fact that data remain hard to find and to productively reuse because data and their metadata i) are wholly inaccessible, ii) are in non-standard or incompatible representations, iii) do not conform to community standards, and iv) have unclear or highly restricted terms and conditions that preclude legitimate reuse. These limitations require a rethink on data can be made machine and AI-ready - the key motivation behind the FAIR Guiding Principles. Concurrently, while recent efforts have explored the use of deep learning to fuse disparate data into predictive models for a wide range of biomedical applications, these models often fail even when the correct answer is already known, and fail to explain individual predictions in terms that data scientists can appreciate. These limitations suggest that new methods to produce practical artificial intelligence are still needed.
In this talk, I will discuss our work in (1) building an integrative knowledge infrastructure to prepare FAIR and "AI-ready" data and services along with (2) neurosymbolic AI methods to improve the quality of predictions and to generate plausible explanations. Attention is given to standards, platforms, and methods to wrangle knowledge into simple, but effective semantic and latent representations, and to make these available into standards-compliant and discoverable interfaces that can be used in model building, validation, and explanation. Our work, and those of others in the field, creates a baseline for building trustworthy and easy to deploy AI models in biomedicine.
Bio
Dr. Michel Dumontier is the Distinguished Professor of Data Science at Maastricht University, founder and executive director of the Institute of Data Science, and co-founder of the FAIR (Findable, Accessible, Interoperable and Reusable) data principles. His research explores socio-technological approaches for responsible discovery science, which includes collaborative multi-modal knowledge graphs, privacy-preserving distributed data mining, and AI methods for drug discovery and personalized medicine. His work is supported through the Dutch National Research Agenda, the Netherlands Organisation for Scientific Research, Horizon Europe, the European Open Science Cloud, the US National Institutes of Health, and a Marie-Curie Innovative Training Network. He is the editor-in-chief for the journal Data Science and is internationally recognized for his contributions in bioinformatics, biomedical informatics, and semantic technologies including ontologies and linked data.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
3. INTRODUCTION
Tire marks are produced when a tire slides across a paved surface, leaving dark
rubber particles on the pavement.
Similar to the way an eraser leaves particles on a piece of paper.
These are marks on road resulting from friction caused by vehicle tyres locked in
position of brakes.
4. TYPES OF TYRE MARKS
1] Yaw Marks :-
Yaw marks made by a tire that is rotating and sliding slideways parallel to
that wheel’s axle ; also referred to as slide-slip or critical-speed scuff marks.
If a vehicle yaws, then the velocity of directions deviates from its heading.
5. 2] Tire Scrub Marks :-
A skid mark caused by the vehicle being redirected as a result
of a collision ; mark generally look like irregularity shaped
smears and are characteristics of the point of impact.
6. 3] Skid Marks :-
Skid marks caused by tires on roads occurs when a vehicle wheel stops the
rolling and a slides or spins on the surface of road.
The Skid marks can be analysed by to find the maximum and the minimum
vehicle speed prior to an impact or an incident.
The Skidding can also occurs on the black ice or the diesel deposits on the
road and it may not leave a mark at all.
7. Skid marks are classified into following types :
1] Acceleration Marks :-
If the drive tires are spinning faster than the vehicle
speed, heavy burn marks will be remains on
pavement at the initial view of accelerator.
The tire rib maybe visible in the centre of an
imprint.
8. 2] Deceleration Marks :-
Deceleration marks occur when tires are spinning slower than the vehicle
because of braking or downshifting.
When a vehicle brakes a greater portion of the vehicles weight is transmitted
to the outer edges of the front tires.
This causes parallel skid marks.
9. 3] Imprint Marks :-
It occurs when a car veers off the road or drives within water or mud and
then the tires touch a road, leaving an imprint of the tire on the asphalt.
Imprint marks aren’t exactly skid marks because they aren’t caused when
tire skids on the asphalt rather they are tire tracks.
10. CHARACTERISTICS
The class characteristics include general patterns and
size.
An individual characteristics include daily wear and
tear, accidental cuts as well as holes.
Depending upon the surface and circumstances of the
track, characteristics may be reproduced in the tracks
left by the tire.
11. IDENTIFICATION
1] Width of Tyre :- The tyre width is a distance between two edges of the
tyre and the size varies for scooters , cars and buses , etc.
2] Circumstances of Tyre :- It is an important for determining the size as
well as the type of the tyre.
3] Tread Pattern :- Tyres are different from one to another and hence it
help to identify the make of the tyre.
12. EXAMANINATION
Tyre tread impression is to be photographed at the crime scene whether or
not a casting must be made.
If the object containing the impression cannot be taken to the laboratory
for casting or further analysis then the three dimensional tyre impression
must be made.
More times there are difficulty in examine or making a better cast and if it
is not possible then photographic technique must used.
In many cases, impression may extend to several feet resulting in very
bulky casts.
According to the negative cast being made, it was compared with negative
since likes only can be subjected comparison.
13. FORENSIC SIGNIFICANCE
Tyre marks and tyre have acquired great importance in criminal
investigations and their evaluation help in:-
Identification the vehicles which are involved in hit and run cases.
solving cases involving kidnapping.
Indicating mode of arrival of the suspect and his departure from the
crime.
Finding out the hideouts of the criminals by trailing.