Peter and jessica are both forensic scientists. peter visits crime scenes to pr
the evidence collected by peter. which type of forensic scientists are peter a
peter is a
who visits visit a crime scene to gather evidence
further analyzes the evidence gathered by peter.

Peter is a Field Officer and Jessica is a Lab Officer

Explanation:

For Plato it should be, Peter is a "Field officer" because he's going into the fiend of the crime scene to find his evidence

And Jessica is a "Lab officer" because she stay's in the lab to analyze the evidence brought to her by Peter  

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.