Likewise, sometimes these same schools will offer Masters Degrees in forensic-related fields. Still, these programs tend to be offered under the Criminal Justice wing of the school. You'll see in a lot of course descriptions that the classes were designed for police officers in continuing education. Of course, a regular graduate student can enroll in these courses, graduate with the degree, then get a huge leg up on the job market when he graduates, being able to call himself a "criminalist" in the broadest sense of the word. In the end, this kind of degree is called an M.A. in Criminalistics or an M.A. in Criminal Justice -- or, with enough research, sometimes an M.S. in the field. But -- and this is the important distinction -- it is still Criminal Justice, a social science.
Forensic Science for the scientist
When a college or university goes so far as to grant a B.S. in Forensic Science, they are usually very careful to make sure you know how to do science. Many will have curricula similar to what you find for medical schools: general chemistry and lab, organic chemistry and lab, math, physics and lab, and usually a course in cell biology and statistics to round things out. The school is not requiring this just to be a hard-ass, but instead wants you to be aware that you will be getting a degree (usually a B.S.) in a hard science. Granted, it is a hard "applied" science -- as opposed to a hard "pure" science like plain chemistry or physics -- but it is still a hard science nevertheless. So when you walk into a lab, you shouldn't be in the position to embarrass your school when you don't know what a gas chromatograph is.
You can also find Masters of Arts (M.A.) programs in Criminal Justice or Criminalistics throughout the United States. These are, in essence, a collection of courses in criminology, criminal psychology and forensic law all rolled into a social-science degree. This is not to denigrate the degree. Rather, it is to indicate that the practitioner of forensic science holding the degree is not a lab scientist.