do now: 1. what was dr. edmond locard contribution to forensic science? 2. looking at this picture,...

COMPLETE THE FOLLOWING ON A SHEET OF PAPER. WRITE THE OBJECTIVE AND ANSWER THE QUESTIONS IN COMPLETE SENTENCES. YOU DO NOT HAVE TO WRITE THE QUESTIONS.

THIS IS SILENT AND INDEPENDENT WORK.

Do Now:1. What was Dr. Edmond Locard contribution to

forensic science?

2. Looking at thispicture, what evidence couldbe found on thebeer can? (locard exchange principle)

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Review

Procedures Forensic Science Locard Exchange Principle Example

3

Forensic Science

Forensic Science is the application of science to law.

4

Locard’s Exchange Principle Whenever 2 objects come in

contact with one another, they exchange some material

5

Processing a crime scene

You and a partner come up with steps on processing a crime scene.

When the police arrive --- > when evidence is collected

Ten step max If you finish early…Get three different colored

sheets of paper in front of you. Find some scissorsFind some tape

Processing a crime scene

FOLDABLE

Clear your table 6 groups 7s crime scene

The Seven S’s of a Crime Scene?

The Scene is simply defined as the actual site or location in which the incident took place.

Securing the Scene Important that the first responding officer on the scene protect the individuals

involved as a first priority.

Protecting the evidence is the second task. The entire investigation could be dependent on this.

Scene is secured by a restricting a perimeter, utilizing rope or tape.

WhoWhatWhenWhereWhyHow

Why is it important to secure the scene?

Separating the Witness

Why????

Separating the Witness

Witnesses must not be allowed to talk with each other.

This is done so they do not compare stories and so that a new story is not created. (collusion)

Separating the Witness

What witnesses say weighed heavily

Testimonial Evidence Testimonial Evidence

Statement made under oath

What is said in court by a competent witness

Also called direct evidence

Why would testimonial evidence be called direct evidence???

Testimonial evidence

Are they accurate?

Testimonial evidence

Certain information affects eye witness accounts Mug shots Leading/Suggestive questions

Memory errors Time between the crime and questioning of witness can affect what

they remember Perception errors

Too dark Encounter too brief Presence of weapon diverted witnesses attention

Testimonial evidence

Certain information affects eye witness accounts Mug shots Leading/Suggestive questions

Memory errors Time between the crime and questioning of witness can affect what

they remember Perception errors

Too dark Encounter too brief Presence of weapon diverted witnesses attention Perception Error

The Innocence Project

National organization dedicated to exonerating wrongfully convicted people through DNA evidence

Eye witness misidentification is the number one cause of wrongfully convictions nationwide

As of 2008, the Innocence Project exonerated 212 wrongfully convicted people

7s again

Review

Do nows and objectives Forensic science LEP 7s in order 1s 2s QUESTONS???

Exit Ticket

Remember this is done individually and silentlyComplete sentences for each questionBecause you are writing in complete sentences you do notneed to write the question

1. What could happen if the 7s was done out of order?2. What may happen if the first officer on the scene forgot to

secure the scene?3. Why is testimonial evidence unreliable?

Scanning the Scene A forensic examiner needs to be able to scan the scene to

determine if there is a primary crime scene or potentially a secondary crime scene.

Primary scene- place the incident occurred Secondary scene- any other place connected to the

incident Ex. This is done by the team leader who assumes

control and assigns other duties such as who will be the : Photographer Log Recorder Sketch Artist Evidence Recorder and other personnel Specialist- entomologist, blood splatter, etc

Seeing the scene

Done by the photographer

A photograph is a two-dimensional reproduction of the crime scene. It serves as the permanent record of the crime scene. Everyone involved in the investigation will have an opportunity to look at

theses photographs (the District Attorney, the defense counsel, homicide detectives, etc). They are also very important to you because the photographs will serve

as “memory joggers” when you have to get up on the witness stand and testify.

Good pictures are essential because most trials do not take place until a year

or more has passed. Videos can also be taking at the crime

Seeing the Scene

This is done by the photographer Requirements of each photo: Photograph overall area from up close and

medium range and far away prior to moving anything.

Close up of each piece of evidence with evidence marker (including corpse)

Include a point of reference to indicate size. ( a ruler, a pen, a car key)

Sketching the Scene

An accurate rough sketch drawn to scale noting position of evidence and body.

All objects should be measured from 2 immovable landmarks

Sketch should include Case #, date, time, locations, and assignments.

Also included should be dimensions of room, furniture, doors, windows, distance of objects or bodies from entrances and exits

Key Legend, should include direction and scale

Crime SceneSketch

28

Date: August 14, 2001 Criminalist: Ann WilsonTime: 11:35 Location: 4358 Rockledge Dr

St. Louis, Mo.

A. Couch/sofa

B. Female body

C. Knife

D. Over turned Lamp

E. Chairs

F. Table

G. Fireplace

c

D

E

EE

E

E

A G

F

Exit Ticket

Remember this is done individually and silently2-3 complete sentences for each questionBecause you are writing in complete sentences you do notneed to write the question

1. What could happen if the 7s was done out of order?2. What may happen if the first officer on the scene forgot to

secure the scene?3. Why are photos and sketches an important part of crime

scene?