Yep, I've seen the tape. Like I said sh*! got real-he wanted it off his chest, but he didn't want to spend the rest of life in jail, so he acted like he didn't know details until the cops reminded him of what he already knew-he just wasn't ready to be put on trial for murder.
As far as the DNA goes-since he was beaten in a parking lot face down and strangled, he could have been picked up DNA from the street, the boys probably had a good amount of random DNA on them since they were just in a club/bar.
I think they both guilty-I think it is unfortunate we can't link DNA to them yet