Experienced this first hand, was arrested in an interior and the cop was just waiting around for me to do /surrender so I called some groupmates to come and get me. I'm assuming that when the timer nearly up because he released me and killed me because I wasn't on guard.
Would stop cops from abusing especially in scenarios like that, if they aren't going to bother taking a criminal to the local police department then they shouldn't bother trying to arrest them.