A forensic autopsy can be really nasty because the body may have been sitting for a while. Like really nasty. It's really the only kind of pathology which is like that. There may be autopsy techs that do a lot of it though, depends on the place.
Otherwise it's likely to be looking at microscope slides (probably with the residents if it's at a med school on one of those multi scopes) and watching him fill out paperwork. Forensics guys and ladies have to do all sorts of extra legal stuff, but you probably won't get to see him deposed or have to testify. Depositions suck because the other attorney is trying to totally discredit you, so they can be complete jerks and question your whole competence as a human being. At a jury trial everyone is much more civil, because a jury doesn't like an ahole either.
Let us know how it goes though, I've only worked a tiny bit with forensic path, so have a tiny sample/view.