Video: Colin Farrell and Vince Vaughn grill each other in 'True Confessions' on Jimmy Fallon
True Detective co-stars Colin Farrell and Vince Vaughn put their on-screen interrogation skills to the test on Jimmy Fallon's US chat show.
The pair are the leading lights in the second series of the hit show that will air in the US on Sunday night and Sky Atlantic on Monday at 9pm.
In the game, each player was given an envelope and had to read out what was inside, with the other two players deciding whether their confession was true or false.
See how Farrell's ploy of twitching before he even read out the letter worked out below.