Forensic science involves reconstructing events of a crime by determining what happened, how, when, where, and who was involved. It relies on several principles including individuality, exchange, progressive change, comparison, analysis, and probability. Forensic science branches include toxicology, anthropology, odontology, biology, and questioned documents. Toxicology detects toxins in bodily fluids and tissues. Anthropology identifies bones and skeletal remains. Odontology examines teeth and dental work. Biology analyzes plant/animal evidence. Questioned documents examines handwriting, ink, paper, printers, and other materials for evidence.
DEFINATION
Any material can develop significance in crime scene is physical evidence
Locard’s Exchange Principle
Locard’s Principle
Types of Evidence
Trace Evidence
Trace Evidence
Trace Evidence can be Fragile and Easily Lost
Transfer Evidence
Indented or Impression Evidence
Scope and significance of forensic chemistryNeha Agarwal
Forensic chemistry is the application of chemistry and its subfield, forensic toxicology, in a legal setting. A forensic chemist can assist in the identification of unknown materials found at a crime scene.[1] Specialists in this field have a wide array of methods and instruments to help identify unknown substances. These include high-performance liquid chromatography, gas chromatography-mass spectrometry, atomic absorption spectroscopy, Fourier transform infrared spectroscopy, and thin layer chromatography. The range of different methods is important due to the destructive nature of some instruments and the number of possible unknown substances that can be found at a scene. Forensic chemists prefer using nondestructive methods first, to preserve evidence and to determine which destructive methods will produce the best results.
Along with other forensic specialists, forensic chemists commonly testify in court as expert witnesses regarding their findings. Forensic chemists follow a set of standards that have been proposed by various agencies and governing bodies, including the Scientific Working Group on the Analysis of Seized Drugs. In addition to the standard operating procedures proposed by the group, specific agencies have their own standards regarding the quality assurance and quality control of their results and their instruments. To ensure the accuracy of what they are reporting, forensic chemists routinely check and verify that their instruments are working correctly and are still able to detect and measure various quantities of different substances.
DEFINATION
Any material can develop significance in crime scene is physical evidence
Locard’s Exchange Principle
Locard’s Principle
Types of Evidence
Trace Evidence
Trace Evidence
Trace Evidence can be Fragile and Easily Lost
Transfer Evidence
Indented or Impression Evidence
Scope and significance of forensic chemistryNeha Agarwal
Forensic chemistry is the application of chemistry and its subfield, forensic toxicology, in a legal setting. A forensic chemist can assist in the identification of unknown materials found at a crime scene.[1] Specialists in this field have a wide array of methods and instruments to help identify unknown substances. These include high-performance liquid chromatography, gas chromatography-mass spectrometry, atomic absorption spectroscopy, Fourier transform infrared spectroscopy, and thin layer chromatography. The range of different methods is important due to the destructive nature of some instruments and the number of possible unknown substances that can be found at a scene. Forensic chemists prefer using nondestructive methods first, to preserve evidence and to determine which destructive methods will produce the best results.
Along with other forensic specialists, forensic chemists commonly testify in court as expert witnesses regarding their findings. Forensic chemists follow a set of standards that have been proposed by various agencies and governing bodies, including the Scientific Working Group on the Analysis of Seized Drugs. In addition to the standard operating procedures proposed by the group, specific agencies have their own standards regarding the quality assurance and quality control of their results and their instruments. To ensure the accuracy of what they are reporting, forensic chemists routinely check and verify that their instruments are working correctly and are still able to detect and measure various quantities of different substances.
It is the beginning point for obtaining evidence which will be used by the crime scene investigator and the forensic expert
A thorough investigation of the crime scene must be completed
Crime scene is basically a scene of occurrence of crime. It is a place where a particular crime has been committed.
It is starting point for the investigator.
A complete review of Forensic Science and its various branches.Hamza Mohammad
This is a complete review of Forensic Science and its various branches and the various methodology and techniques used for forensic analysis of various evidences and examination of crime scene.
This presentation is a study material for the forensic aptitude and caliber test (fact and fact plus examination). This contains the topics Principles of forensic science and disciplines of forensic science. For the educational video please go to the link https://youtu.be/VBpgshoOQR4
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...
It is the beginning point for obtaining evidence which will be used by the crime scene investigator and the forensic expert
A thorough investigation of the crime scene must be completed
Crime scene is basically a scene of occurrence of crime. It is a place where a particular crime has been committed.
It is starting point for the investigator.
A complete review of Forensic Science and its various branches.Hamza Mohammad
This is a complete review of Forensic Science and its various branches and the various methodology and techniques used for forensic analysis of various evidences and examination of crime scene.
This presentation is a study material for the forensic aptitude and caliber test (fact and fact plus examination). This contains the topics Principles of forensic science and disciplines of forensic science. For the educational video please go to the link https://youtu.be/VBpgshoOQR4
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...
Introduction to Forensics by Piyush B. Thakur Piyush Thakur
Forensic scientist manage crime scene evidence for Police Department, Crime Branches, CBI, CID, Forensic Science Laboratories, IB, Banks, Defense/Army, Courts, Quality Control Bureau, Narcotics Dept., Universities, Hospitals, Organizations etc...also in Private Sector like Detective Agencies, Banks, Insurance Companies, Universities, Hospitals, Security Services Agencies, Helpful to Lawyers/Advocates, Law Firms, Private Companies, Own Private Practice etc... they play an integral role in the catching, conviction and acquittal of suspects in cases of all levels .
The are the notes for the newly added subject in B.Sc. Nursing Curriculum in 5th Semester and the subject is Forensic Nursing here is the 1st Unit as per the new 2024 INC Syllabus.
In 2020, the Ministry of Home Affairs established a committee led by Prof. (Dr.) Ranbir Singh, former Vice Chancellor of National Law University (NLU), Delhi. This committee was tasked with reviewing the three codes of criminal law. The primary objective of the committee was to propose comprehensive reforms to the country’s criminal laws in a manner that is both principled and effective.
The committee’s focus was on ensuring the safety and security of individuals, communities, and the nation as a whole. Throughout its deliberations, the committee aimed to uphold constitutional values such as justice, dignity, and the intrinsic value of each individual. Their goal was to recommend amendments to the criminal laws that align with these values and priorities.
Subsequently, in February, the committee successfully submitted its recommendations regarding amendments to the criminal law. These recommendations are intended to serve as a foundation for enhancing the current legal framework, promoting safety and security, and upholding the constitutional principles of justice, dignity, and the inherent worth of every individual.
Lifting the Corporate Veil. Power Point Presentationseri bangash
"Lifting the Corporate Veil" is a legal concept that refers to the judicial act of disregarding the separate legal personality of a corporation or limited liability company (LLC). Normally, a corporation is considered a legal entity separate from its shareholders or members, meaning that the personal assets of shareholders or members are protected from the liabilities of the corporation. However, there are certain situations where courts may decide to "pierce" or "lift" the corporate veil, holding shareholders or members personally liable for the debts or actions of the corporation.
Here are some common scenarios in which courts might lift the corporate veil:
Fraud or Illegality: If shareholders or members use the corporate structure to perpetrate fraud, evade legal obligations, or engage in illegal activities, courts may disregard the corporate entity and hold those individuals personally liable.
Undercapitalization: If a corporation is formed with insufficient capital to conduct its intended business and meet its foreseeable liabilities, and this lack of capitalization results in harm to creditors or other parties, courts may lift the corporate veil to hold shareholders or members liable.
Failure to Observe Corporate Formalities: Corporations and LLCs are required to observe certain formalities, such as holding regular meetings, maintaining separate financial records, and avoiding commingling of personal and corporate assets. If these formalities are not observed and the corporate structure is used as a mere façade, courts may disregard the corporate entity.
Alter Ego: If there is such a unity of interest and ownership between the corporation and its shareholders or members that the separate personalities of the corporation and the individuals no longer exist, courts may treat the corporation as the alter ego of its owners and hold them personally liable.
Group Enterprises: In some cases, where multiple corporations are closely related or form part of a single economic unit, courts may pierce the corporate veil to achieve equity, particularly if one corporation's actions harm creditors or other stakeholders and the corporate structure is being used to shield culpable parties from liability.
A "File Trademark" is a legal term referring to the registration of a unique symbol, logo, or name used to identify and distinguish products or services. This process provides legal protection, granting exclusive rights to the trademark owner, and helps prevent unauthorized use by competitors.
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Defending Weapons Offence Charges: Role of Mississauga Criminal Defence LawyersHarpreetSaini48
Discover how Mississauga criminal defence lawyers defend clients facing weapon offence charges with expert legal guidance and courtroom representation.
To know more visit: https://www.saini-law.com/
Synopsis On Annual General Meeting/Extra Ordinary General Meeting With Ordinary And Special Businesses And Ordinary And Special Resolutions with Companies (Postal Ballot) Regulations, 2018
Guide on the use of Artificial Intelligence-based tools by lawyers and law fi...Massimo Talia
This guide aims to provide information on how lawyers will be able to use the opportunities provided by AI tools and how such tools could help the business processes of small firms. Its objective is to provide lawyers with some background to understand what they can and cannot realistically expect from these products. This guide aims to give a reference point for small law practices in the EU
against which they can evaluate those classes of AI applications that are probably the most relevant for them.
2. Laws and Principles of Forensic Science
• Forensic science is concerned with the reconstruction of unique
events — attempting to determine
– what happened
– how it happened
– where and when it happened
– who was involved
• Each crime occurs under a different combination of circumstances
affected by an enormous number of variables, and is thus
nonreplicable
• Forensic scientists deals with samples that are limited in size and
quality, and which have an unknown history
• Legal process imposes unique constraints and characteristics on
forensic science
3. Law of individuality
Principle of exchange
Law of progressive change
Principle of comparison
Principle of analysis
Law of probability
The laws and principles of all the natural sciences are
the bases of forensic science. In addition, it has
developed its own principles which are as follows:
4. • Every object, natural or man-made, has an individuality which is not
duplicated in any other object. This principle, at first sight appears to be
contrary to common beliefs and observations.
• The grains of sand or common salt , seeds of plants or twins look exactly
alike. Likewise, man-made objects: coins of the same denomination
made in the same mint, currency notes printed with the same printing
blocks one after the other (excluding serial number) and typewriters of
the same make, model and batch appear to be indistinguishable. Yet the
individuality is always there. It is due to small flaws in the materials, in
the arrangement of the crystals, imperfect stamping or due to inclusions
of some extraneous matter. The individuality has been verified in certain
fields.
• The law of individuality is of fundamental importance in forensic
science. Anything and everything involved in a crime, has an
individuality. If the sane is established , it connects the crime and the
criminal.
Law of individuality
5. • Contact exchanges traces is the principle of exchange. It was first
enunciated by the French scientist, Edmond Locard.
• According to the principal, when a criminal or his instruments of crime
come in contact with the victim or the objects surrounding him, they
leave traces. Likewise, the criminal or his instruments pick up traces from
the same contact. Thus, a mutual exchange of traces like takes place
between the criminal, the victim and the objects involved in the crime If
these traces are identified to the original source, viz., the criminal or his
instrument (or vice versa), they establish the contact and pin the crime on
to the criminal. The principal of exchange is aptly demonstrated in hit and
run cases and in offences against person.
If the investigating officer is able to establish the points of contact , he is
likely to gather physical clues:
• If a criminal enters the premises through a ventilator , he leaves his
foot prints in dust on the sill.
• If he breaks a window or a door, the jimmy leaves its marks on the
wooden frame.
Principle of exchange
6. Principle of recovery
• Do not harm (evidence)
• Nothing should be added, damaged or obliterated in the recovery
process
• Particular attention should be paid to avoiding contamination, a
concern that gains increasing importance with each advance in
analytical sensitivity.
• Where there is risk of losing or damaging evidence, appropriate experts
should be called in.
• Exhibit items should be safely and securely packaged as soon as
possible.
• If an object is portable, transfer to the lab for evidence recovery under
controlled conditions.
• Do no harm to yourself! Crime scenes and recovered evidence may
pose biological or chemical hazards.
• Health & safety measures for collecting and transporting evidence.
7. Everything changes with the passage of time. The rate of change varies
tremendously with different objects.
1. The criminal undergoes rapid changes. If he is not apprehended in time, he
becomes unrecognizable except perhaps through his fingerprints, bone
fractures or other characteristics of permanent nature which are not always
available.
2. The scene of occurrence undergoes rapid changes. The weather, the
vegetable growth, and the living beings (especially human-beings) make
extensive changes in comparatively short periods. Longer the delay in
examining the scene, greater will be the changes. After some time ,the
scene may become unrecognizable.
3. The objects involved in crime change gradually, the firearm barrels loosen ,
metal objects rust, the shoes suffer additional wear and tear and the tools
acquire new surface patterns. In course of time the objects may loose all
practical identity vis-à-vis a particular crime.
The principle, therefore, demands prompt action in all aspects of criminal
investigation.
Law of progressive change
8. • Improper sampling and contamination render the best analysis
useless. The principle emphasizes the necessity of correct
sampling and correct packing for effective use of experts.
For example:-
A small amount of dust is recovered from a small sticky patch of
the shoe of a culprit. The investigating officer collects about two
kilograms of soil from the scene packs it in tin and sends it as a
control sample. The results of comparison are inconclusive.
Why?
Principle of analysis
9. Only the like can be compared is the principle of comparison.
It emphasizes the necessity of providing like samples and specimens
for comparison with the questioned items:
1. In a murder case, a bullet is recovered from the deceased. The
expert opines that the bullet has been fired from a firearm firing
high velocity projectiles like a service rifle. It is futile to send
shotguns, pistols or revolvers as the possible suspect firearm.
2. A bunch of hair is recovered from the hands of a deceased. The
expert opines that the hair belong to a Negroid person. Hair from
persons of white races for comparison will not be of any use.
3. The questioned writing is found to have been writing with a ball pen.
To send fountain pen as a likely instrument of writing is futile.
Principle of comparison
10. • All identifications, definite or indefinite, are made, consciously
or unconsciously, on the basis of probability.
• Probability is the mathematical concept.
• It determines the chances of occurrence of a particular event in
a particular way out of a number of ways in which the event can
take place or fail to take place with equal facility.
If P= represents probability
Ns = the number of ways in which the event can successfully
occur (with equal facility) and
Nf = the number of ways in which it can fail(with equal facility),
Then the probability of success is given by the formula:
P= Ns/ Ns+ N2.
Law of Probability
11. Principle of Presentation
• Working within an ethical framework, a forensic scientist should
fully disclose and present impartial evidence which is readily
understandable and neither overstated nor understated.
• Full disclosure of all facts, assumptions, data, conclusions and
interpretations should be made.
– Lab report: Complete & retained.
• He or she should not be an advocate for either side of the case
at hand; it is, however, to be expected that a forensic scientist
will be an advocate for his or her opinion.
• However, the forensic scientist should be prepared to change an
opinion whenever background circumstances or assumptions
change, or new information becomes available.
13. Toxicology
• Toxicology deals with the detection of toxic substances and
drugs in body tissues and fluids.
• The toxicologist analyzes biological fluids and tissues from
victims who are thought to have been poisoned accidentally or
purposely.
• The toxicologist, as distinct from the forensic chemist,
primarily handles biological materials and can detect poisons
in blood, urine, spinal fluid, gastric contents, bile, and tissues.
14. Anthropology
• Forensic anthropologists are experts in the identification of
bones and skeletal remains. Their studies provide information
about sex, race, age, and time of death.
• They may also lend support to investigations concerning living
cases such as a mix-up of children in a hospital nursery or
skeletal identification of persons involved in immigration
problems.
• The forensic anthropologist may be extremely helpful in mass
disasters with considerable skeletal remains or in cases of mass
burials.
• A recent application of this expertise was reconstructing the face
of a skeletonized head.
15. Odontology
• The odontologist, or dentist, provides information through
examination of teeth and dental prostheses. Victims of a disaster
or homicide may be identified by a comparison of their dental
charts and X-rays to the dental evidence from the victims.
• Bitemarks in apples, cheese, chewing gum, and other media, as
well as on a victim’s body, may be studied by these scientists.
• This form of expertise may also be used in living cases, as the
examination of teeth is helpful where there is a possibility of a
hospital mix-up of children, as such examinations may depend
upon the presence on inherited characteristics in teeth.
16. Biology
• The examination of plant life, insects, soil, trees, dirt, seeds,
and pollen, as well as blood analysis, can be a means of
developing new resources to a forensic investigation
17. Questioned Documents
• Questioned document (QD) examinations were reported as far
back as Roman times, when cases of forged documents were
described.
• The modern use of typewriters and computer printers has added
significantly to the activities of questioned document examiners.
• The QD examiner’s work includes the examination of
handwriting, ink, paper, typewriter or printer impressions, or any
other form of writing or printing that may have been used in a
case.
• This expertise includes detection of counterfeiting and various
types of fraud involving government paper, checks, forms,
money, and credit cards or the possible falsification of entries in a
ship’s log.
• The investigation of computer fraud may also examine the
validity of printout material
18. Forensic psychology
• It is the intersection between psychology and the justice system.
It involves understanding criminal law in the
relevant jurisdictions in order to be able to interact appropriately
with judges, attorneys and other legal professionals.
• It is concerned with collecting, examining, and presenting
evidence to help facilitate a legal decision. Within the legal
system, forensic psychology provides a means for being able to
enforce the law while taking human behavior into consideration.
• A forensic psychologist may be called upon to differentiate
between criminal behavior and human behavior that may be
caused by a psychological imbalance.
19. Physics
• Types of evidences examined
The application of physics for purposes of civil or criminal law.
• Indirectly, physics has contributed to forensic science via the
invention of the microscope, the electron microscope, the mass
spectrometer, and optical spectrometers; but directly, its role in
forensic science has been minimal.
• Forensic physics has traditionally involved the measurement of
density (soil and glass examination), index of refraction, and
birefringence (fiber analysis, glass examination).
20. Ballistics
• Ballistics is the science of mechanics that deals with the flight,
behavior, and effects of projectiles, especially bullets, gravity
bombs, rockets, or the like; the science or art of designing and
accelerating projectiles so as to achieve a desired performance.
21. Forensic Entomology
• Forensic entomology is the study of the insects associated with a
human corpse in an effort to determine elapsed time since
death.
• Insect evidence may also show that the body has been moved to
a second site after death, or that the body has been disturbed at
some time, either by animals, or by the killer returning to the
scene of the crime. However, the primary purpose of forensic
entomology today is to determine elapsed time since death.
22. Judicial officer
• A judicial officer is a person with the responsibilities and powers
to facilitate, arbitrate, preside over, and make decisions and
directions in regard to the application of the law.
• Judicial officers are typically categorized
as judges, magistrates, puisne judicial officers such as justices of
the peace or officers of courts of limited jurisdiction;
and notaries public and commissioners of oaths.
• The powers of judicial officers vary and are usually limited to a
certain jurisdiction.
23. Role of Police
• Securing the scene
• Questioning
• Assisting in evidence collection
• Documenting
• Arresting/taking into custody
Role of a medico legal expert
• Necessary to determine the cause of death.
24. Forensic Science Lab
– Processing of the scene of crime, collection, handling,
preservation, packaging of the physical evidence
– Sample collection
– Quick spot-test kits
– Scanning devices: UV, IR scanning devices
– Items: Gloves, Bags, cotton, cardboard boxes, labeling tools
– Photography
25. 1. Observe a problem or questioned evidence.
2. Consider a hypothesis to know the way of crime.
3. Examine, test and analyze those evidence.
4. Determine the significance of the evidence.
5. Formulate a theory based on evaluation of the significance of
the evidence
Forensic scientist has to