My Thoughts On the Cop (Contains Spoiler)
I thought the cop felt sorry for Ray, felt she was in over her head (she was) didn't know what she was doing (she didn't).
I think he came after her and caught her so easily, to protect her. He got her early, to spend a few months in jail, so that something worse didn't happen to her.
He liked her, not in a romantic way but recognized she was not the type of person who could handle this kind of thing in the long run. So he made sure she got caught, and got out of it.
What does anyone else think?