I wrote a cop!both-fic, if you're interested? there's no bottom specified, so that's all for you to decide.
Making friends with shadows on the wall (http://archiveofourown.org/works/644121): Jensen was just doing his job. He made no mistake. There is a note on his bathroom-mirror that actually says so - "You did nothing wrong". But it was wrong anyway.


Edit: I just realized that it's already in j2-recs, so maybe you've read it already...