August 19, 2014 watch me!

 Describe the steps to take when processing a crime scene  Describe how to package evidence  Explain the importance of preserving chain of custody Learner profile trait: Knowledgeable

 Crime scene – anywhere evidence may be located  Primary crime scene – the place where the crime was committed (example: where someone was murdered)  Secondary crime scene – another place related to a crime (example: where the body was dumped)

First responders – the first people at a crime scene, usually police, firemen, or medical personnel.

Duties of the first responders 1. Scene management  Establish scene diameters  Identify potential hazards  Assist injured persons  Search for and arrest suspect, if possible

First responders – the first people at a crime scene, usually police, firemen, or medical personnel. Duties of the first responders 1. Scene management  Establish scene diameters  Identify potential hazards  Assist injured persons  Search for and arrest suspect, if possible Discuss with a partner: What is the importance of scene management? What is the drawback of first assisting injured persons?

Duties of the first responders 2. Secure the crime scene – prevent access by unauthorized personnel ▪ Use physical barriers like vehicles and/or crime scene tape ▪ Establish a crime scene security officer ▪ Keep a security log of all entries and exits ▪ May use multilevel security

Duties of the first responders ▪ May use multilevel security Level 1: Restriction of general public; medial allowed Level 2: Offical business only; command center here Level 3: Highest security

Duties of the first responders ▪ May use multilevel security Level 1: Restriction of general public; medial allowed Level 2: Offical business only; command center here Level 3: Highest security Discuss with a partner: What important principle of forensics is related to the need to secure the crime scene? What is the benefit of multi-level security?

Duties of the crime scene investigator 3. Develop a plan and coordinate investigation Review existing security and adjust if necessary Detain, isolate, and interview witnesses and suspects Coordinate team members

Duties of the crime scene investigator 3. Develop a plan and coordinate investigation Review existing security and adjust if necessary Detain, isolate, and interview witnesses and suspects Coordinate team members Why must witnesses be isolated?

4. Observe and document the crime scene a.Conduct an initial walk-through  Identify transient evidence,  Note all areas (such as exits and entrances) that need special attention,  Assess the need for specialty equipment or personnel,  Take initial photographs and documentation

4. Observe and document the crime scene b. Document the scene with photographs, videotapes, and/or sketches (more on this later!) c. Collect and package evidence (more later!)

4. Observe and document the crime scene b. Document the scene with photographs, videotapes, and/or sketches (more on this later!) c. Collect and package evidence (more later!) 5. Review the crime scene for missed evidence

4. Observe and document the crime scene b. Document the scene with photographs, videotapes, and/or sketches (more on this later!) c. Collect and package evidence (more later!) 5. Review the crime scene for missed evidence 6. Maintain Chain of Custody ▪ Keep a record of every person who has had possession of evidence at every time

4. Observe and document the crime scene b. Document the scene with photographs, videotapes, and/or sketches (more on this later!) c. Collect and package evidence (more later!) 5. Review the crime scene for missed evidence 6. Maintain Chain of Custody ▪ Keep a record of every person who has had possession of evidence at every time Why is chain of custody important ?

You Do ▪ Study the steps for 2 minutes ▪ Put away notes ▪ When I say go, rearrange the strips of paper into the correct order

 One person designated as evidence collector  Ensures that evidence is collected, packaged, and marked in a consistent manner  Responsible that nothing is lost of contaminated  Transient evidence collected first

 Most pieces of evidence will go in two containers  Outer container will be labeled with:  Name of collector  Date, time, and location of collection  Type of evidence  Chain of custody

 Controls (samples with known origin) are taken for comparison Example: If a blood stain is found, blood would be collected from victims and suspects for comparison. What other types of evidence might require controls?

We do – Evaluate Scenario A Read the Crime Scene and Scenario A

We do – Evaluate Scenario A Read the Crime Scene and Scenario A As a class, discuss: What was done correctly? What was done wrong, and how may those things hurt the investigation?

You do – In pairs, evaluate crime scene B and C What was done correctly? What was done wrong, and how may those things hurt the investigation?

4 (or 5 or 6) headed monster …

 Document analysis lab!  Major grade!

What, if anything, did we do right in analyzing the classroom crime scene? What should we have done differently?