I am a current MP or as the Navy calls them, Master Arms. I am an E-6, therefore an MA1. Life in the "Military Beat" is much like on the outside. Yes, there are gates to stand and fences to watch from time to time, but domestics, murder, rape, DUI's and so forth are all a part of the military life too. If you are assigned to a large base such as camp Pendelton, CA you will see much of these things along with interaction with civilian law enforcement. As someone stated above, we can not act as civilian LEO's however, we are asked to work with them quite frequently especially in drug cases involving military members outside the gate. You as a Marine have the opportunity to work your way up through investigations and eventually work for NCIS if you wish. When you are selected, you will actually be a sworn Special Agent and carry those credentials. Once working with NCIS, you pretty much put your uniform behind you and become a civy until your gig with them is up.
There is alot to be done, so don't think you are going to be guarding POW's or waving cars through the gates ALL of the time.
Good Luck!
Master At Arms, First Class Petty Officer, United States Navy
WARHEADS ON FOREHEADS!!!!