Probability (S02E14)

Detectives Goren (Vincent D'Onofrio) and Eames (Kathryn Erbe) poke around an insurance scam ring that passes off scrubbed-up homeless men for phony French executives - and when the poor men turn up murdered, the suspects collect on lucrative life-insurance policies. However, after the cops recruit an extremely peculiar industry fraud expert (guest star Mark Linn-Baker) to help them profile the culprits, they are surprised to find one of the ringleaders slain in his apartment. (iTunes)