What are the main concerns when collecting evidence?
1. What are the main concerns when collecting evidence? That you are thorough, collect everything, do it in the proper and official manner, and that you do not tamper with or alter anything.
What must be considered when collecting evidence?
Each container should have: the collecting person’s initials; the date and time it was collected; a complete description of the evidence and where it was found; and the investigating agency’s name and their file number. Each type of evidence has a specific value in an investigation.
How do you avoid contamination of evidence?
This cross-contamination can be avoided or prevented by the practice of handling only one exhibit at a time, marking that exhibit, placing into a secure container, and decontaminating the investigator by changing gloves and discarding any item could have come into contact with the previous exhibit.
What can contaminate evidence?
Contaminated evidence is any foreign material that is introduced to a crime scene after the crime is committed.. Contaminated evidence can be brought in by witnesses, suspects, victims, emergency responders, fire fighters, police officers and investigators.
How do you handle evidence?
Every piece of evidence needs to be properly collected and labeled so that it may one day, if necessary, be admissible in court. Evidence must be packaged separately from other pieces of evidence, and care must also be taken with containers that such evidence is stored in so that cross-contamination does not occur.
What are the four types of evidence collected in the evidence collection process?
Remember, the best way to collect unbiased evidence is to gather evidence from each of the four categories: people, physical, paper and recordings. Each piece of evidence collected will lead you to the truth of the incident so that you can identify problems and analyze root causes for effective corrective actions.
What should be done to evidences that Cannot be tagged?
All evidence collected at the crime scene should be tagged. If the item cannot be tagged then it should be labeled or marked. Consistency should always be adhered to in the information that is used for marking and labeling the evidence.
Why contaminants must be avoided in DNA samples?
When you start with a contaminated DNA sample, there is a high probability that you will get erroneous results in your subsequent experimentations. By purifying your DNA samples, you reduce the probability that such things will happen and you can better preserve the quality and purity of your nucleic acids.