All About Evidence Dairon Caro Robert Garcia Denise Perez
Is any item or information gathered at the scene of a crime, or at related locations which tends to disapprove or establish something.
It can be divided into two general goods:
Testimonial Evidence Physical Evidence Evidence
Testimonial Evidence Statement made under oath It’s said in court by a competent witness. Also called direct evidence
Important factors to take in account with eye witness Type of crime & how witness saw it. Memory (ability to remember characteristics. Ex: hair, color, sex, age height, reliving event, if their was a presence of weapons.) Interviewing techniques (open ended questions) Relationship of witness to suspect How much time has passed between offense and id. If the witness id the defendant. ***** Most known cases of an innocent person being convicted has happened due to a mistaken eye witness.
The Innocence Project National Organization dedicated to exonerating wrongfully convicted people through DNA evidence. Number 1 cause of wrongfully convictions nationwide is because of eye witness misidentification.
Jeffrey Dahmer Case
Physical Evidence Tangible tend to prove or disapprove a fact Real evidence Refers to any item that would be present at the crime scene on the victims out found in a suspects possession. more reliable than testimonial evidence Can be any material or object in any shape, size, form.
Physical Evidence Types of Physical Evidence: Trace Evidence Transient Evidence Conditional Evidence Indirect Evidence Individual Evidence Class Evidence
refers to physical evidence that is found in small but measurable amounts. (For example: hair, fibers, skin cells, DNA, blood, etc.)
temporary evidence can be easily changed or lost. Recorded at the time by usually the first office at the scene. (For example: odors, temperature, imprints, etc)
produced by a specific action or event at the scene. (For example: lights, doors, windows, position of furniture, etc)
does not prove or disprove a fact in question. (For example driving under the influence)
can be related to a single source. (For example fingerprints. Handwritings, etc)
Can be associated with a group of items that share properties or characteristics. (For example: blue jeans)
The Locard Principle Locard's Exchange Principle states that with contact between two items, there will always be an exchange. This is the basis of trace evidence collection at a crime scene. “Every contact leaves a trace”
Probability and Class Evidence Activity Today in school, a student was seen from far vandalizing a hallway in the 3rd building. The person was wearing a black shirt, khaki pants, black shoes and had brown hair. How can we figure out who the student was or how to narrow the pool of suspects?