Hi! They might look for the help of a forensic chemist because they study chemistry so they would be able to tell you about the toxic substance and what it can do along with the side effects. A forensic geneticist studies genes, a forensic sociologist studies human behavior, and a forensic etymologist studies origin and history of words. So the most helpful one would be the forensic chemist. i hope this helps, Goodluck :)
Answers:
Obviously, this is going to depend on what your Teacher taught in class, but my guesses would be:
Exit polls protect election results from possible fraud.
Exit polls provide back up data in case vote counts fail.
No you can’t just quit after you started because you already committed yourself to it.