Why do police use paper bags for evidence?
Paper bags work well for both fresh and dried blood or semen stains, for example. Paper evidence collection bags are also useful for storing fabric and textile evidence because air permeability is beneficial with this type of evidence.
What evidence goes in a paper bag?
Evidence that is wet or that may contain body fluids (blood, semen, etc.) must be air-dried completely. Such items should be packaged in paper bags/boxes. Known samples can be collected by rubbing sterile swabs against the cheek, inside the mouth.
Can biological evidence be put in a plastic bag?
When transporting and storing evidence that may contain DNA, it is important to keep the evidence dry and at room temperature. Never place evidence that may contain DNA in plastic bags because plastic bags will retain damaging moisture.
What are three ways investigators use evidence collected at a crime scene?
Crime scene investigators collect evidence such as fingerprints, footprints, tire tracks, blood and other body fluids, hairs, fibers and fire debris. NIJ funds projects to improve: Identification of blood and other body fluids at the scene. Field detection of drugs and explosives.
What type of evidence does the FBI consider to be the most value?
Answer Expert Verified. The answer is DNA. There are several ways to obtain DNA samples, like blood, saliva, semen or hair. They are very important to guarantee a certified verification of the people involved with the situation and guarantee the best investigation possible of the event.
What are three ways investigators use evidence?
List three ways investigators use evidence collected at a crime scene.
- May prove that a crime has been committed.
- Establish any key elements of a crime.
- Link a suspect with a crime scene or a victim.
- Establish the identity of a victim or suspect.
- Corroborate verbal witness testimony.
- Exonerate the innocent.