17/6/2020 6.02.1

OBJECTIVES

Student will be able to:1. Explain what Crime Scene Management is.

2. List four(4) of the seven (7) processing steps.

3. Explain importance of establishing an Entry Log

4. Define “Chain of Custody”7/6/2020 2

Objectives cont.

5. ID primary objective at a crime scene.

6. Explain the benefits of Crime Scene Management.

7. Explain importance of locating evidence.

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You may Find a Scene Like This

Are you prepared????7/6/2020

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First

Prepare yourself for crime scenes.Is your Vehicle equipped for scene processing?

Camera RulersClipboard Bags (paper/plastic)Tape Bullet boxesMarkers Tape measureBarrier tape Tags

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Getting to the Scene

To be of any use, you must first get to the scene.

76 % of all crimes will not have a suspect there when you arrive

Dead Policemen create their own crime scene.

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Approaching the Scene

What do I see as I get closer?

People or vehicles moving away from area of the call– avoiding eye contact

Where do I park? A: NOT as close as possible

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Your at the Scene

Q. Who’s in charge ?A. You are - until relieved.

Q. What are my Departments SOP ?

A. Know this before you get to a scene.

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What is a Crime Scene ?

Place where a crime happened.

Place where evidence is found.

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Crime Scene Classifications

Primary Scene – original location

Secondary Scene – associated w/ original

Tertiary – alternate location such as suspect vehicle, autopsy etc

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Crime Scene management

A systematic process or methodology for processing a crime scene.

Processing a CS itself is time consuming and difficult.

Locating and collecting evidence is the primary objective at a crime scene.

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Crime Scene Management

Insures that a scene has been completely assessed, documented, and evidence collected.

Enhances time management

Provides structure and organization to an already tumultuous situation.

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When does it Begin?

Before you arrive – you must be

Mentally prepared

Physically prepared

Outfitted 7/6/2020 13

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Responsibilities It’s up to you to make the case

More cases have been lost because of initial

actions by 1st Responder.

You set the tone of the investigation

Your competency is at stake

The CASE is at stake7/6/2020

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7 Step Crime Scene Protocol

1. ID potential safety & health hazards2. Establish scene dimensions & set security3. Plan and communicate4. Primary survey - evaluate the scene5. Document and process (protect)6. Final survey of the scene -detailed7. Recover and Preserve all evidence7/6/2020

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Your Protection, #1 Priority

Know what’s behind the door

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Secure area

ID possible threats / victimsSuspectsHazards

Chemical, Biological, Electrical

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Secure & Control Persons Call for back up etc Locate & Separate

* Suspects* Witnesses

Keep bystanders back Protect Victim Keep Family / Friends away

*remember*7/6/2020

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Scene Assessment

Determine type of scene (crime) Evaluate safety issues (blood, hazards etc) Search & Seizure issues Establish entry/exit for personnel Evaluate boundaries Set secure area (evidence / meeting)

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Protect & Secure the Scene

Assess the scene* POE / POE

Set physical barriers Don’t make the area to small Establish entry log Protect fragile evidence

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Conduct “Walk-Through”

Assess the evidenceprotect fragile evidencelocation(s)

Develop game plan for processing of scene Preliminary documentation of scene

PhotosNotes

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Crime scene log

Start it as soon as you arrive Any name is subject to a subpoena Will help in controlling the

scene Documents arrival / departure Adds integrity Lists possible witnesses 7/6/2020

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Establish the Dimensions

Whole house or part of it?Commercial business ?

VehiclesUrban areas

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Detailed account from start to finish. What you did What you saw Where you saw it When you saw it What actions you took Things said and done by others

Document Actions & Observations

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Protect Fragile Evidence

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Sketches vs. Final Diagram

Good way to keep things relatedSketch is very rough – more than neededMeasurements if neededFINAL – usually done to scale

for courtno measurementsnot as cluttered as rough sketch

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Release & Brief

Brief the Investigator

Assist in controlling the scene

Turn over responsibility of the scene

OR

continue on with your investigation7/6/2020

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Control & Evidence Collection

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Locards “Principle of Exchange”

Dr Edmond Locard (Frenchman)Pioneer of forensic science

“Cannot enter a place without leaving something nor leave a place with out taking”

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Physical Evidence

Any tangible article that tends to prove or disapprove a point in question.

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Physical Evidence

does not forget is not confusedcannot be wrong cannot perjure itself

“Only human failure to find it, study & understand it, can diminish its value”

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Physical EvidenceEvidence Triangle

Scene

Suspect Victim7/6/2020 32

Physical Evidence

Standards

Known to the Unknown

Unknown bullet to known firearm

Unknown Latent to known rolled impressions

Unknown shoeprint cast to known shoe

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Chain of Custody

Evidence presented in court is one

and the same collected during the

investigation.

In other words:

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Chain of Custody

Who had contact with the evidence

At what time

Under what circumstances

What, if any, changes were made to the evidence7/6/2020 35

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Type of CrimeSuicide or Murder

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Determine Forensic NeedsOther Officials that may be needed

ChiefCrime Lab peopleFire DeptCoroner

Call for specialistsentomologistanthropologist

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Secondary Survey Establish plan Who’s going to search what Assignment of duties

PhotoLatentsEvidence CollectionEvidence log

How is it going to be searched7/6/2020

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How would you protect this?

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Reconstruction

Form a “HYPOTHESIS” or loose idea of what you think may have happened. Based on what you know NOT what you think.

Don’t make the evidence fit your theory

Do Not be rigid in your Hypothesis

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Re-Inspect the scene

Double check the sceneBe sure you have all your equipmentAll items have been collected,

photographed and documentedLast chance- as info comes in, new items

may be evidence. Left any evidence/equipment behind

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REMEMBER

You may only get one chance You set the tone (competent ?) Speed is NOT good. Be prepared Organize – mental issue Document what you did

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And ?????

You don’t have to be an expert in forensic science, but you should understand:

Different types of forensic evidence How evidence should be collected &

preserved

You will collect & process evidence7/6/2020 43