First off, those aren’t “roles” he had… He’s a background extra. Which pretty much means needing no other talent than the ability to answer your phone, say yes to whatever the casting person tells you and to show up on time. I actually happen to be the background casting person for a couple of those movies. I would love to know who it is… Background actors are the most wacked-out, delusional people in the movie business!
This guy isn’t on IMDB, and if he was, you’d be more likely to find him searching the episode of The Sopranos “Made in America”, which was the only episode directed by David Chase other than the pilot, and then cross referencing the actors described as “patient” or “mental patient” with the actors from the only two episodes of Law and Order: SVU that were directed by Eriq LaSalle. Then check any matching actors’ profiles. Triangulation mothafuckas do you speak it?