I did read somewhere that he played a killer in one of the earlier seasons of Miami. Not sure what episode exactly though. You're probably right about what episode.
^^ According to his bio at IMBd, Wes Ramsey (aka Dave) was in 'Spring Break' season 1....yes the dude with fake teeth. Been ages since I saw that epi, but as soon as I saw that posted above I could immediatly picture him from that episode --nice catch.
That's probably why he's working in the lab. Well not the same character, but the actor. I've seen actors come back on a show sometimes if it's been a few years playing different characters (and maybe with a different look), and the average casual viewer probably wouldn't notice. Even on CSI:LV they did it with Archie. A few episodes before he was first on it as Archie, he was on an episode as Campus Security Tech.
I only recognized him cause when I saw that epi on season one I distinctly remember thinking "hotnesssss!!! Too bad he is a bad guy", and then I saw him on that first episode he appeard on this season and I thought he looked familiar and then when I saw him in this one I was sure it was him and thought "hotnesssssss!!!! :drool: