I meant random as in I cannot find anyone who can connect him to that night or Lauren. The posts I have found literally just seem like they went down ZO's friend list and found someone dark like the mystery man in the witness statement. I must be missing the Gatto post that explains it. I will search around more-if anyone else has the link handy that connects AB to Lauren and that night I would be very grateful!!!
I don't think there is anything concrete that connects him to Lauren that night. As far as I know, he is ZO's roommate and ZO is (allegedly) the person who punched CR at Smallwood, but no one has placed AB there during the 'altercation'. AB's description may partially match the vague description of Tony Gatto's witness. (I.e. He has sideburns and 'dark skin', but may not match the height description) and he lives near the sighting. He also sent a stupid tweet about finding Lauren with adderall and a flashlight that made him look like a jerk.
I think that's it. You can find it all here: http://tonygatto.wordpress.com/2011/07/04/man-who-confronted-lauren-spierers-friend-at-smallwood-identified-as-zachary-oakes/