1 / 14

Types of Evidence and the Crime Scene Investigation Team

Types of Evidence and the Crime Scene Investigation Team. Mr. Chapman Forensics 30. Types of Evidence. Direct Evidence – includes firsthand observations such as eyewitness accounts or police dashboard video cameras.

holli
Download Presentation

Types of Evidence and the Crime Scene Investigation Team

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Types of Evidence and the Crime Scene Investigation Team Mr. Chapman Forensics 30

  2. Types of Evidence Direct Evidence – includes firsthand observations such as eyewitness accounts or police dashboard video cameras. Direct evidence includes what witnesses said, heard, or did, and confessions are included as direct evidence.

  3. Types of Evidence Continued... Circumstantial evidence – indirect evidence that can be used to imply a fact but that DOES NOT DIRECTLY PROVE IT. Circumstantial evidence on its own is almost NEVER enough to directly convict a person of committing a crime.

  4. Types of Evidence Continued... TRACE evidence is a form of circumstantial evidence, and the one that most people are the most familiar with. CIRCUMSTANTIAL evidence can be found in one of two ways:

  5. Types of Circumstantial Evidence... Physical Evidence: includes fingerprints, footprints, shoe prints, tire impressions, and tool marks. Generally, physical evidence reduces the number of suspects to a very small group. Exception: Fingerprints are generally as condemning as forms of biological evidence.

  6. Types of Circumstantial Evidence... Biological Evidence: includes body fluids, hair, plant parts, and natural fibres. Biological evidence is typically the most persuasive type of evidence in court, as it can narrow the suspects to an extremely small group of people, or even one individual.

  7. Another Grouping of Evidence Class evidence: narrows an identity to a group of persons or things. For example, if Type A blood is found at the scene, that narrows the group of suspects to anyone with Type A blood. Individual evidence: narrows the field to a single person or thing. A fingerprint is an example of individual evidence.

  8. The Crime Scene Investigation Team Who is involved in a crime scene investigation?

  9. Police Officers Usually the first to arrive at a crime scene. May require that a district attorney be present to determine whether a search warrant is necessary for the crime-scene investigators.

  10. Crime-Scene Investigators Document the crime scene in detail and collect physical evidence. CSIs include: Recorders: to record the data Sketch artists: to sketch the scene

  11. CSIs Continued... Photographers: to take photos of the crime-scene. Other, general evidence collectors.

  12. Medical Examiners & Detectives Medical Examiners: also known as coroners, and may be necessary to determine the cause of death. Detectives: look for leads by interviewing witnesses and talking to the crime-scene investigators about the evidence. Notice that the CSIs don’t do this!

  13. Specialists Entomologists Forensic scientists Forensic psychologists All these specialists may be consulted if their expertise are required.

  14. Comprehension Questions What type of evidence most closely resembles individual evidence – physical or biological? What are two different types of crime-scene investigators? What is a detective’s role at a crime-scene?

More Related