1. Forensic Evidence

2. What is it • Forensic evidence refers to items collected or information gathered using scientific methods for use in legal proceedings. There are many types of forensic evidence that can be obtained to help investigators solve crimes.

3. Trace EvidenceTrace evidence describes small pieces of evidence that are collected and are related to the victim or the perpetrator. These might include fibers, paint chips, hair or grass.

4. Types • Bloodstains • Bloodstains and blood spatter analysis involve examining the location, spread and trajectory of blood at a crime scene. It can be used to determine the cause of death, the location of the victim and the perpetrator, and/or the type of weapon.

5. Fingerprints • Crime scene technicians carefully examine all evidence and dust crime scenes to look for fingerprints, which can be used to identify individuals as being present at the scene.

6. Ballistics • Ballistics is the study of firearms and ammunition. Evidence analyzed by ballistic experts might include bullets or spent shell casings, and firearms.

7. DNA • DNA evidence can be used to establish the identification of an individual who was present at a given place. It can be obtained from a sample of any bodily fluid such as saliva, semen or blood.

8. Tools used • Forensic science revolves around studying evidence collected at a crime scene. This evidence can come in a variety of forms, from murder weapons and shell casings, to blood and other bodily fluids. To safely collect and transport this evidence without contamination, crime scene investigators use a range of specially designed equipment and tools. Every crime scene is different but most require a basic forensic evidence toolkit.

9. Surgical Gloves • One of the most important aspects of gathering forensic evidence is avoiding contamination. Investigators wear rubber surgical gloves as they collect evidence to ensure the evidence is not compromised by traces from their skin or fingerprints. Gloves are also important for handling potentially dangerous substances.

10. Paper and plastic bags • Paper and Plastic Bags • To transport evidence, the evidence must first be placed in an evidence bag. While most items can go in sealed plastic bags, evidence that contains bodily fluids, such as semen, blood or urine, should be allowed to dry and then moved using paper bags. Investigators often substitute sealed paper envelopes for smaller fluid evidence.

11. Specific Tools • Specific Tools • Some tools used by investigators are specifically designed to serve one purpose. For instance, gunshot residue (GSR) is collected using a GSR kit, which contains the necessary items for successfully testing for, and documenting the presence of, the residue. The same can be said for evidence of sexual assault, which is gathered from the victim with a sexual assault kit that contains a collection of supplies.

12. Your job: Answer the following • Can you use computers to find evidence? • What type of training do you have to get to be a Forensic expert? • You will be watching several episodes of a specific mystery series . Your job is to find out who is the criminal ? What evidence could be use to solve the mystery?

13. Watch the video • Solve the case ? • Who is the guilty person? • Please write your crime investigation in detail.