I'm concerned that you're going into a job where you may not be able to handle all aspects of what is expected of you. No, a high school counselor doesn't deal with a LOT of criminal activity, but at some point, if you make this your career, it will indeed come up, even if you work at the poshest of the posh schools. Criminal behavior is something as small as stealing (yep, saw that in high school) or bulling (yep, saw that in high school, can also be considered harassment) or physically hurting another person (yep, fights are par for the course in a high school setting).

Are you really sure that counseling is the right thing for you? In a school setting? Maybe you should be a private counselor who deals with something non-criminal like....clients who can't deal with going to work on Monday because its too stressful. (Sorry, I couldn't really think of any other therapeutic setting that wouldn't have the possibility of criminal behavior popping up.)