Objective: SWBAT Describe the proper procedures for conducting a systemic search of crime scenes for physical evidence SWBAT describe proper techniques.

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Presentation transcript:

Objective: SWBAT Describe the proper procedures for conducting a systemic search of crime scenes for physical evidence SWBAT describe proper techniques for packaging common types of physical evidence Do Now: 1. How is trace evidence and the locard exchange principle related? 2. Can evidence be trace and testimonial? 3. Name one piece of evidence that is physical AND trace AND transient AND class. (this evidence should fit under all 4 categories) **** assigned seats are up to you Do now is silent and independent Write both objectives

Announcements Assigned Seats Quiz on Wednesday – determine homework 85%- pass Average of 85% or higher Notebook check on Thursday

Review 3s 4s 5s 6s Physical Conditional Trace Transient Class Individual Circumstantial 3

Clarification Scan the scene purpose Transient Evidence - change by nature Conditional evidence -

Small AreaLarge Area 1 Person A lot of people Search for evidence

Securing and Collecting Evidence 1.Gloves, tweezers, cotton swab 2.Put in appropriate bag 3.Complete Chain of Custody

Pink sheets Letters only What would you use to collect this with…….. Cotton swabs Tweezers Gloves

What would be the best collection tool? a.Gloves b.Tweezers c.Swab BRUSH

What would be the best collection tool? a.Gloves b.Tweezers c.Swab Urine on Toilet

What would be the best collection tool? a.Gloves b.Tweezers c.Swab Used Tissue

What would be the best collection tool? a.Gloves b.Tweezers c.Swab Blood stain

4 Requirements for Evidence to be Admitted into Court: 1)It must be legally obtained (search warrant) 2)Must be relevant to the crime (material & probative) 3)Witness must identify the item, identifying it’s origin 4)Chain of Custody must be demonstrated (every person that handled must also be available to testify)

4 Requirements for Evidence to be Admitted into Court: 1)It must be legally obtained (search warrant) 2)Must be relevant to the crime (material & probative) 3)Witness must identify the item, identifying it’s origin 4)Chain of Custody must be demonstrated (every person that handled must also be available to testify)

Search Warrants Need probable cause Why What Where signature of a judge

Warrantless Searches 1)Emergency Situations- police may search a building because of emergency situation (but they can’t come back again without warrant )

2)Loss of Evidence-person or situation might cause evidence to be lost (ex: fire, person flushing drugs down toilet)

3)Lawful Arrest-when a person is arrested any property in his/her immediate control (vehicle, house) can be searched.

4)Consented Search-when a person gives permission

Ma’am can you open your truck Yes sir, let me find my keys What type of warrantless search would this be? a.Emergency situation b.Loss of evidence c.Lawful arrest d.Consent

What type of warrantless search would this be? a.Emergency situation b.Loss of evidence c.Lawful arrest d.Consent

What type of warrantless search would this be? a.Emergency situation b.Loss of evidence c.Lawful arrest d.Consent

All evidence is collected differently Paper bag– When wet or can damage plastic Plastic bag– if dry

Chain of custody List of everyone that carried the evidence Evidence is fair and honest beyond all reasonable doubts Idea is to prevent evidence from being tampered with

Quiz Review 1. Warrantless search scenarios 2. Search methods 3. Collecting evidence 4. 7s 5. Team captain

Exit Ticket 1. What could happen if the chain of custody wasn’t carried out correctly? 2. How can a collusion effect a trial? 3. What may happen if you “see the scene” before you “scan the scene”?

Sketching the Scene it_2_CSI_&_Evidence/Notes_Unit_2- CSI_&_%20Physical_Evidence.pdf