Waking the Dead

Anger Management (1) (4x7)

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A man staying in a "halfway house" for released prisoners uses a gun - that is revealed to have been used in contract killings years ago - commit suicide. The gun is later stolen from Frankie's lab. Investigations reveal that the gun could have been used by a hired assassin in 9 murders over the last 30 years. Boyd is taking Anger Management.