There’s no good argument that Sidney Lumet’s little-seen second-to-last film, Find Me Guilty, is a classic courtroom drama on par with Lumet’s 12 Angry Men and The Verdict, but it didn’t get nearly the respect it deserved. Produced on a low budget and shabbily photographed on digital video, the film isn’t that dynamic visually and Vin Diesel gives a performance that’s about as far from his stoic badass persona as possible. Yet Find Me Guilty stands as a surprising gem in both Lumet’s and Diesel’s filmography, an outrageous courtroom comedy that draws heavily on transcripts from the real trial of a gangster who decides to serve as his own defense attorney. Diesel plays Giacomo “Jackie” DiNorscio, a convicted mobster who resurfaces in court to answer new charges against him and dozens of his cohorts. Jackie refuses to rat out his family and, most curiously, refuses to accept proper representation, so he presents a defense that’s wildly unconventional, to say the last. There’s a cartoon broadness to Diesel’s gangster that’s out of step with the earthy realism of Lumet’s other work, but that’s part of the appeal of Find Me Guilty, which takes this absurd true story and plays it to the hilt. The film airs on Sunday, March 29 at 4 p.m. Eastern on Showtime Extreme.