I am a Marine military policeman (Reserve). Our MOS is the only one where women will be sent into combat. It is true that women are weaker than men, but the most important factor is controlled aggression. Often times a man might think, since he is almost always bigger, that a women is a pushover. However, if the women policeman is aggressive (ie yells, threatens in a sure manner, displays ability to exert force through mannerisms), the man will submit. Also note that civilian police in dangerous areas are usually in pairs, so the strength of the male officer and the more tacit nature of the female officer compliment each other well.
Also, I remember my Senior Drill Instructor telling us then-recruits a story about how he dated a woman Marine Military Policeman. He said she thought she was so tough, as is the reputation for Marine MPs. So, despite being a woman she thought her self bad a$$ as well. That story ended on a funny note, however...
Your profile says you love the military. If you really want to go into law enforcement and surmount the stereotype that women and weaker, less active, less aggressive, then join the Marine Corps military police occupational field. You will be exptected to do pretty much the same as guys, and if you can equal them in all standards, you will be one of the fewer, the prouder--a woman Marine.
Thanks alot for that! Yes, I have a brother-in-law who is currently in Iraq who is in the Marine Corps. He has told me many things about women MPs. Thanks alot for that input, and may God Bless you, and thank you for your service.