While of course mug shots are not proof of guilt, and I have seen that many times, RA looks both resigned and scared to me. Like, "they got me." I think it will be DNA evidence that led to him. And I'd like to know why he wasn't swabbed for DNA when he was inserting himself into the situation by placing himself at the bridge, if that is true. Or at least stealth DNA gotten right away. If true that he volunteered himself as being there that day. Also, if he WAS swabbed 5+ years ago, is this like the rape kits, with a huge backlog of testing??? JMO. And I have to wonder, was there another DNA present, as in accomplice??? Is that why they are still asking for tips? JUSTICE FOR ABBY AND LIBBY.