In my state, Connecticut, a certain number is seats in the state university law school are reserved for cops. I don’t know how widespread this practice. It’s worth looking into because it means that gaining entrance under this program is less competitive than it would be otherwise. There may also be funds available for tuition support.
One former cop I know who took advantage of this opportunity has a very successful practice in general law. He’s very happy as a small town country lawyer. Depending on what your interests are, some career paths after law school are easier or more difficult.