Contrary to popular belief most forensic guys (and gals) I know have a degree in a science of some sort. For instance if you want to do ballistics it helps to have a degree in physics, chemistry or something like that. For those who want to do most anything else a degree in biology or physical science would probably work better. For forensic psychology a PhD or PsyD would work best, for cyber crimes a computer degree, etc.
So what type of forensics are you wanting to get into? There really isn't an overall forensics degree out there, instead it is generally shopped out or given to very specialized professionals. Unless of course you are talking about a "tag and bagger" (crime scene technician) in which case you merely pick up, catalog and collect evidence.