Wondering what Vin Diesel's been up to lately? Well, he's been off making a fact-based courtroom flick with ... legendary director Sidney Lumet, that's who. Entitled "Find Me Guilty," this one's about a pinched mafia guy who refuses to rat on his friends while opting to act as his own attorney. Trailer here.

"Sent to prison on a drug charge, Jackie Dinorsio refuses to turn government witness against his former associates in the New Jersey Lucchesi crime family. However, prosecutor Sean Casey mounts a huge case under the RICO statutes involving dozens of defendants and their attorneys, including Nick Calabrese. For Casey, it looks like an open and shut case, until Jackie, who is already serving 30 years, decides to defend himself. Initially dismissed as a lunatic, Jackie has a forceful personality and an intrinsic understanding of the legal process that gradually change the course of the trial."

Co-starring Ron Silver, Peter Dinklage, and Alex Rocco, "Find Me Guilty" opens on March 17th. It's Mr. Lumet's first theatrical feature since 1999's "Gloria," but with his body of work, the old master's earned a misstep or two. Unless you can think of another guy who directed "12 Angry Men," "The Pawnbroker," "Fail-Safe," "The Anderson Tapes," "Serpico," "Murder on the Orient Express," "Dog Day Afternoon," "Network," "Prince of the City," "The Verdict," "Running on Empty," and "Q & A."