1. Crime Scene Basics
STEM Forensics

2. What is a Crime Scene?
Any physical location in which CRIME has occurred or is SUSPECTED of having occured

3. Two types of Crime Scene:
Primary Crime Scene- The ORIGINAL location of a crime or accident. Secondary Crime Scene- An ALTERNATE location where ADDITIONAL evidence may be found.

4. Who did it???
Suspect- The Person thought to be CAPABLE of COMMITTING a crime. Accomplice- the SECOND PERSON associated with committing a crime

5. Alibi
Statement of where a suspect was at the time of a crime

6. Testimonial Evidence
Any WITNESSED accounts of an incident or crime

7. Physical Evidence
Any MATERIAL ITEMS that are present at the crime scene or on the victims

8. Trace Evidence
Found at a crime scene in SMALL but MEASURABLE amounts

9. What else can evidence do to help us?
Prove that a crime was committed
Give us an idea of what happened
Give us an idea of what to do next
Link a suspect to the crime scene or victim
Figure out WHO the suspect is
Figure out WHO is innocent

10. Police Officers
They are usually first to arrive at a crime scene. They are responsible for SECURING the scene so that no EVIDENCE is destroyed. They also DETAIN persons of interest in the crime

11. CSI unit
They DOCUMENT the crime scene in detain and COLLECT any physical evidence

12. District Attorney
Often there to help determine if any SEARCH WARRANTS are required to proceed and obtains those warrants from a judge.

13. Medical Examiner
If there is a homicide (murder), they may be present to determine what the CAUSE of DEATH was.

14. Specialists Includes any kind of special forensics expert.
May be called in if EVIDENCE requires expert analysis.

15. Detectives
INTERVIEW witnesses and CONSULT with the CSI unit. They investigate the crime by following leads provided by witnesses and physical evidence

16. Protocol- What are the steps of dealing with a crime scene?
Interview- Ask those around/victims/officers how much they know already about the crime
Examine the evidence/crime scene
Document the scene- take pictures, draw pictures, write down what you see
Process- collecting and analyzing evidence