The first that that the team will do regarding the investigation about the crime scene is to barricade the place and prevent other people from coming close.
It should be noted that an investigation simply means an insight into a particular issue.
Assuming the team takes blood for DNA testing, if a member of the team forgets to wear gloves or makes some other procedural error, the evidence had been cross contaminated.
Lastly, the evidence can be stored in paper containers that are sealed to prevent its loss.
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