Cool Forensic Investigations Young Women s Leadership Academy. Grand Prairie Police Department Amanda Self, CCSA Leticia Hidalgo

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1 Cool Forensic Investigations Young Women s Leadership Academy Grand Prairie Police Department Amanda Self, CCSA Leticia Hidalgo

2 Overview Benefits for School and Educators Benefits for Students What is a CSI? Defined Crime Scene Unit Principles and Terminology Initial Notification Initial Considerations Crime Scene Steps Scenario Work Scene Example Report

3 Benefits for School and Educators Increase state mandated test scores Increase student expectations Higher Level of thinking Engaged kids

4 Benefits for Students Team Building Leadership Skills Appreciation for the Law Enforcement Field Career Opportunities for women

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12 What is a CSI? Observe, document, process, collect, package, and preserve evidence related to the following: Property Crimes Burglary, theft, larceny, financial crimes Crimes Against Persons Assault, battery, sexual assault, robbery, murder, rape, suicide Link victim to scene, suspect to scene, victim to suspect

13 Crime Scene Unit Consists of: Team Leader Assume Control of the Crime Scene Make team assignments. Conduct initial walkthroughs. Determine search patterns. Insure there are sufficient supplies. Monitor the progress at the scene. Release the scene after final walk through.

14 Crime Scene Unit continued Photographer Sketch Artist Someone to help measure for the Sketch Artist A person to recover evidence Usually the entire team will participate in searching the scene. Depending upon the case, a specialist may be present i.e. anthropologist

15 Forensic Science and Locard s Principle of Exchange Forensic Science The application of science to those criminal and civil laws that are enforced by police agencies in a criminal justice system Locard s Principle of Exchange The exchange of materials between two objects that occurs whenever two objects come into contact with one another

16 Other Related Terms Evidence Anything that tends to prove or disprove a fact Transitory Effects Ex. Presence of ice in a glass, burning of a cigarette Latent Prints Not visible to the naked eye

17 Initial Notification Documentation begins the moment you are dispatched. Document the scene in situ (Latin for in place ) BE CAREFUL not to kick or move in any evidence Treat all death scenes as homicides Reports should be labeled as Death Investigation Think outside the box. Don t work in a vacuum. Briefing comes from first responding officer While on the way//at the scene, pay attention to all sights and smells. They may become important later.

18 Initial Considerations Do you need a search warrant? Rule of Thumb-If the suspect has legal access to the scene or if private place-get WARRANT Do you have all the necessary equipment? Scene Contamination Paramedics Firefighters The police Relatives Witnesses

19 Crime Scene Steps Secure the scene (Crime Scene tape) Crime Scene Log Initial Walk through (Observation phase) Document in-situ Note taking, photographs, video, rough sketch to include measurements Collect//Package the evidence Latent print processing Final Walk through Evidence Submission to the lab Report

20 Securing the Scene Some departments use the 2-barrier method. The primary barrier will be the actual crime scene. The secondary barrier will act as a buffer zone where supplies are kept and officials can gather.

21 Securing the scene continued Establish entry//exit not used by suspect Establish an area to maintain supplies outside the primary barrier Notify Medical Examiner Conduct searches until the search is negative

22 Crime Scene Entry Log Once the scene is secure, a crime scene log is established. One officer will keep the log documenting who enters and exits the scene and what time. Only necessary individuals should be allowed into the scene keeping traffic to a minimum and preserving evidence as much as possible. On the log, include: Name Job Title Date/Time in and out Reason for entering

23 Example of a Crime Scene Entry Log

24 Initial Walk Through Completed by team leader DO NOT TOUCH Observe and document Evaluate the scene Plan how the scene will be worked Locate any fragile evidence Fragile evidence will be documented first Ex. Shoe impressions outside on a rainy day Brief the rest of your team

25 Establish Location Note the type of building i.e. brick, wood, house, business, apartment, one story, two story, direction it is facing

26 General Exterior Photographs

27 General Interior Photographs

28 Photographs of the Body Head to foot Foot to Head Right Side Left Side Directly over the body Close up of the face Close up of injuries with and without scale

29 Mid-range and Close-up Photography Mid-range Photo Close-up Photo (Need Scale)

30 Sketch Artist Sketch the immediate area of the scene Orient the diagram Do Not forget to put the North reading on the sketch Not To Scale For most scenes, a bird s eye view will be used. Sketch the evidence in the scene by taking measurements of features and evidence in the scene.

31 Measurement Techniques Rectangulation ( indoor, outdoor) Triangulation (indoor, outdoor, area lacking straight reference points) Secondary reference points (use triangulation or rectangular method to a secondary object that is permanent)

32 Rectangulation

33 Triangulation

34 Final Sketch

35 Search the Scene The objective is to note every condition and every relevant item of physical evidence The method chosen depends on the type of scene, location, and the area it covers Methods: zone or quadrant; grid or strip; contracting or expanding spiral; and double grid The method may need to be changed or adjusted due to circumstances. Search until negative Remember if any evidence is found, you must document from the beginning i.e. photographs and sketch

36 Searches

37 Evidentiary Possibilities Physical Evidence Any object, smell, marking or impression, no matter how small, which may assist the investigator in the reconstruction of the crime, lead to the identification of the criminal, provide a link between a crime and its victim, or a crime and its perpetrator. Fingerprints Firearms/Ballistics Biological Trace Documents Drugs Impression and Pattern Blood Evidence

38 Collection of Biological Evidence Sterile cotton-tipped swab Moisten with distilled water (if blood or other biological material is dried) Allow swab to air dry Package in paper bag or swab box

39 Evidence Collection When searching the scene, identify and label the evidence. Record and describe the evidence. After photos and sketching is complete, collect the evidence in appropriate packaging. Initial and date the seal. Describe the item on the package.

40 Packaging Be sure to include all information on the front of the bag.

41 Packaging Make sure evidence is sealed, dated and initialed. Make sure date and initials cross over seal.

42 Latent Print Processing Powder Brush/Wand Lifting Tape Mounting Cards

43 Latent Print Processing continued Powder Development Lightly powder the item As the print develops, add additional powder as needed (BE CAREFUL! YOU CAN OVERPROCESS!) After the print is developed, it must then be protected, lifted, or photographed (use a scale) for documentation and subsequent comparison with a known inked print. Lifting and Mounting Lift the tape slowly. Exercise control of the item processed as well as the lifting tape. Hold both ends of the tape Place the lift on the latent print card in the same manner as making the original lift. Place one end on the card controlling the tape with the other hand. After smoothing out the tape, trim any excess off.

44 Final Walk Through Completed by team leader Make sure you have all of your supplies. Remember Crime Scene Investigation is not a sprint, it is a marathon. Be thorough. You only have ONE shot. Do it right the first time. Release the scene

45 Submission to the Lab DNA Blood evidence Was someone shot? GSR kit Guns, shell casings, projectiles for ballistics Drug Analysis Touch DNA

46 Report Detailed account of what you observed and done within the crime scene. There should be no CSI Tv Show conclusions, or Clue conclusions. You are documenting the facts and sequence of events (timeline) how you saw them on scene. At the end of the report, include what evidence would be submitted to the lab and what types of testing would be requested.

47 Scenario -Dispatch On May 23 rd at approximately 0300 hours, your team is dispatched to a death investigation at Hillshire Apartments 2783 Beaumont Lane Richmond, Virginia. Search Warrant has been obtained.

48 Scenario -Background Scott Smith W/M (DOB: 02/15/1987) works night shift as a bartender at the So-Ho. Scott Smith did not show up for work. Multiple Co-workers attempted to contact Smith with no answer. After work, several co-workers go to Scott s house to check on him. The door is unlocked. Co-worker s enter and find Scott deceased. Scott recently separated from a volatile relationship with his girlfriend, Maggie O Conner (W/F DOB: 05/02/1989). Relationship ended when Scott caught Maggie in bed with her boss, Joe Todd (W/M DOB: 02/01/1985). Joe is an ex con with a history of domestic abuse.

49 Scenario -Witness Info Scott was last seen June 22, 2015 at 1600 hours by his friend, Taylor Daniel. Taylor advised, Scott was in a great mood. Nothing seemed to be out of the ordinary. Canvas of the area revealed there was a red truck seen in the area driven by a white male. Partial license plate DBC 12

50 Scenario- Additional Info Maggie owns a truck with a license plate DBC 123

51 Any Questions?

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