The Borgias (2011)

S3E21 The Case of the Nimble Nephew

Title: The Mystery of the Agile Relative Plot: Mason is approached by real estate mogul Adam Thompson, who fears that one of his nephews might be pilfering from the family safe. The plot thickens when the body of Thompson's right-hand man turns up, revealing that he was actually the one behind the theft of confidential information.