You are the first person to arrive at a crime scene. An investigator and crime scene technician arrive afterwards to take over the investigation. Which of the following tasks will the crime scene technician be responsible for performing?

A.
Ensure that any documentation and evidence they possessed is handled over to the investigator.

B.
Reestablish a perimeter as new evidence presents itself.

C.
Establish a chain of command.

D.
Tag, bag, and inventory evidence.

Explanation:
You want evidence usable of it is needed for a trial. It is a good idea to seal evidence into a bag and identify the date, time, and person who collected it. This bag-and-tag process makes tampering with the evidence more difficult.
Reference: Security + (SYBEX) page 458