What is his perception of "forensics"
Is he after scenes of crime "csi" type stuff or laboratory? The profession is very very different to tv. "Forensics" as a science is pretty exclusively lab based, csi is the out and about taking fingerprints.
First stop may be to contact your local police force. See if the csi dept or labs can offer anything. Even the police in general, you can learn an awful lot about procedures and the job in an office.
What about a law office, criminal law again will give an understanding of investigating crimes.
If not any lab would do. University, hospital, it's all the same. Or pathology dept. Morgues, funeral homes.
Just as an out there thought, there are companies that specialise in cleaning up crime scenes. Also worth a try.
Gun ranges? Fireams and ballistics are a good specialty.
Photography is also good for csi as much of it is photography.
Basically he may need to think outside the box a bit. But he needs to think whether he's looking at the lab side or the csi side. Totally different.