It Takes a Thief

The Artist is for Framing (2x14)

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Al's arrested in Lucerne, and is accused of four major thefts in four major cities, while he was in each city. While in custody, Inspector Berman describes the thefts with details, that Al realizes, only someone who has physically pulled off the jobs himself, could only know. So Al ""confesses"" to the crimes and makes a deal to return the gems. Now, Berman sees that Al knows that ""he"" did it, so he takes Al to ""recover"" the gems, planning to kill Al and retire after solving his last case, keeping all the gems he stole for himself.