Law & Order: Criminal Intent Episode 1.12 Crazy

Detectives Goren and Eames seek out the person responsible for the murder of a prominent doctor at his son's Bar Mitzvah.

Goren and Eames first suspect the victim's estranged wife but their probe widens when evidence involves a warped forensic psychiatrist who wanted to impress the dead man's pretty sister-in-law. Nevertheless, the attempted prosecution turns thorny when the primary suspect craftily makes an unexpected plea.

The suspect, who provides expert testimony at criminal trials, lays down an insanity defense to hide his obsession for a younger woman, who is the sister-in-law of the victim. He had revealed to her that he hired a corrupt detective to murder the man after alleged reports that her niece had been abused by him.