No, nor have we seen anything that excludes Marty (WH) from consideration, at least as a co-conspirator. He seemed eager, but did not want to appear overly eager, to have the case turned over to the task force, where it might have been quashed (assuming the cult has as far-reaching tentacles as we are led to believe) and taken away from Cohle's control. I think Marty's daughters are damaged, either by abuse or by some knowledge of it. Maybe they're not his and Maggie's daughters at all. That scene where he calls them to dinner and they have a bunch of male dolls posed standing over a naked female doll, plus his older daughter having gotten in trouble for drawing explicit pictures in school, seems meant to steer us to the conclusion that they have lost their innocence somehow. If you turn up the volume on the scene where Marty walks to his daughters' room, the girls are saying something like "They (we?)don't have any parents anymore. They died in a car crash." In this mostly red-herring free show, with carefully crafted dialogue, that has to mean something. Plus, Marty executed Reggie Ledoux while he was handcuffed and caught. Could that have been to silence him and not the result of his rage, as we are meant to assume?