Re: Dexter - Season 7 (with Spoilers)
I don't know about arrested, but I'd be surprised if Angel or LaGuerta didn't at least learn the truth by the finale (Quinn will probably have been whacked by the mob by then, the way it's looking).
I've been wondering how this will play out. I'm not sure if Quinn will get killed, but he does seem to owe Dexter a favor since he didn't get charged after finding RoboCop's blood on his shoe.
"Brace yourself. The area of penetration will no doubt be sensitive." - Mr. Spock, The Immunity Syndrome