Warm-Up August 28, What is considered physical evidence? 2.How do investigators record the crime scene?

Objective  SWBAT explain the steps to be taken to thoroughly record the crime scene.

Agenda 1.Mini-Mystery Thursday 2.Securing the Crime Scene 3.Crime Scene Sketch Lab 4.JonBenet Ramsey Documentary 5.Exit Slip

The Accident 8 th Grade Forensic Science T. Trimpe Case #1

There was nothing Leon, the driver, could do about the impending crash of the car he was driving. Leon knew the car would be completely demolished in the crash. After the crash Leon didn’t have a scratch on him. How can that be?

Leon was driving a remote control car. or He was playing a video game.

CORPUS DELICTI “Body of the Crime”  You must prove  that a crime occurred  that the person charged with the crime was responsible for the crime  Source of Evidence  Body  Primary and/or Secondary Crime Scene  Suspect(s)

CRIME SCENE TEAM  A group of professional investigators, each trained in a variety of special disciplines.  Team Members  First Police Officer on the scene  Medics (if necessary)  Investigator(s)  Medical Examiner (if necessary)  Photographer and/or Field Evidence Technician  Lab Experts

CRIME SCENE INVESTIGATION  Based on the scientific method and the Locard Exchange Principle, logic and forensic techniques  Involves:  Recognition—scene survey, documentation, collection  Identification—comparison testing  Individualization—evaluation and interpretation  Reconstruction—reporting and presenting

PROCESSING A CRIME SCENE  Isolate and secure the scene  Document the scene  Search for evidence  Collect and package evidence, maintaining the chain of custody  Submit evidence to the crime lab

FIRST OFFICER ON THE SCENE  A Assess the crime scene and assist those hurt  D Detain the witness  A Arrest the perpetrator  P Protect the crime scene  T Take notes

CRIME SCENE SURVEY Walk-through—performed by the crime scene investigator, the first officer and sometimes the lead detective Purpose:  Mentally prepare a reconstruction theory  Note any transient or conditional evidence that could change over time.  Note weather conditions  Note points of entry or exit, as well as paths of travel within the crime scene  Record initial observations of who, what, where, when, and how  Identify special needs within the crime scene for personnel, precautions or equipment and notify superior officers or other agencies

DOCUMENTATION  Notes—date and time, description of the location, weather and environmental conditions, description of the crime, location of the evidence relative to other key points, the names of all people involved, modifications that have occurred and other relevant information  Photography—photos of scene and surroundings, mid- range to close-up photos with various angles of each piece of evidence, photos as viewed by any witnesses.  Sketches—inclusion of date, time, scale, reference points, distance measurements, names of investigators, victims, suspects, and a legend (key)  Videography—allows narration (non-subjective) to be included

CRIME SCENE SKETCH Date: August 14, 2005Criminalist: Ann Wilson Time: 11:35 amLocation: 4358 Rockledge Dr, St. Louis, Mo. N

CRIME SCENE SKETCH ACTIVITY  You and your team will take notes and sketch the scene and not the measurements of the scene.  Your original on-site sketch will be a “not to scale” diagram.  Follow the hints under Illustrating the Sketch and Labeling the Sketch.  Make sure you get all necessary detail!

JonBenet Ramsey Documentary 1.Who were the main suspects in JonBenet’s murder? 2.What was unusual about the ransom note? 3.What did police officers fail to do when they arrived at the Ramsey house? 4.What evidence did the detective find/not find when she arrived on the scene? 5.Who found the body of JonBenet?

Homework Reading Assignment #2 due Tuesday Online forms and signed contracts

Exit Slip – August 28, Get out a mobile device or use one of the computers and go to m.socrative.com. You can also use one of the iPads that has the Socrative app. 2. When prompted, enter for the room number. QUESTION: What does the first officer on a crime scene need to do?