Robert Patrick has played many iconic roles throughout his long career, from the evil android T-1000 in 1991’s Terminator 2: Judgment Day, to Special Agent John Doggett on the final two seasons of The X-Files‘ original run. But some fans believe that one Patrick character holds an even more infamous place in TV history: according to a The Sopranos fan theory, Davey Scatino, his season two character, is actually the unseen assassin who finishes Tony Soprano off in the show’s final episode. In a new interview with TV Insider, Patrick addressed the theory, revealing that Sopranos creator David Chase “is the only one that knows.”

Who was Davey Scatino on The Sopranos?

Patrick’s Davey Scatino is a gambling addict, sporting goods store owner, and childhood friend of Tony’s. In a season 2 plot arc, Davey’s decision to turn to Tony for money to enter a high-stakes poker tournament results in the man eventually losing his store and his family, and moving to Nevada to work as a ranch hand; later on, Tony’s daughter Meadow reports that he is receiving treatment at a mental health facility.

What is the fan theory that Davey Scatino killed Tony Soprano?

The fan theory hinges on the character who walks into Holsten’s during the show’s final scene, sporting a USA cap, shortly before “Don’t Stop Believin'” begins playing — an actor who bears a striking resemblance to Patrick.

In a post on Reddit’s r/thesopranos board, a fan wrote “Watched the finale last night for the first time in years after rewatching the entire series. The guy who enters Holstens with the USA hat on looked a lot like Davey Scatino, whose life Tony ruined. If Tony is dead, Scatino did it right then and there. My original theory was that the cut to black just represented the end of the show, nothing more. How else would Chase end a show like that? Love and hugs and laughs? There was no way to tie that show up in a neat little bow so he just ended it. Just like Tony’s relationship with Melfi. But the more I think about it, that might’ve been Scatino.”

What does Robert Patrick think about the theory?

In a TV Insider interview focused on his recent role on Tulsa King, Patrick weighed in the rumor — though he did not know how popular it had become, asking “Did that really get a lot of traction?”

After noting that “David Chase is the only one that knows” the fate of Tony Soprano, Patrick confirmed that he did not appear in the scene at Holsten’s, and is not the man in the USA cap: “I was never contacted about it. I don’t know. Was there a guy that might have looked like me, or people thought that it was me? … It’s interesting. Yeah, I wonder. I don’t know. I feel blessed that people would really still be thinking about my character at the end. But boy, what a great experience.”

He also revealed that he brought a Sopranos in-joke with him to Tulsa King. His line “How’s your balls, Manfredi?,” aimed at Sylvester Stallone‘s Dwight Manfredi, was derived from something James Gandolfini once said to the actor: “That [line] came from Jimmy Gandolfini. That’s what Jimmy came in and said to me right before we shot that scene where he beats me up in my office to collect. Jimmy came in to me and said to me, as Jimmy to Robert Patrick, ‘How’s your balls?’ So I threw that out there to Stallone, he loved it: How’s your balls, Manfredi?’

Additional reporting by Amanda Bell