Mad Dog

S7 E18: McCoy (Sam Waterston) testifies at the parole hearing of a convicted serial rapist and is enraged when the perpetrator, Lewis Darnell (guest star Burt Young), is released after serving only 18 years of a 30-year sentence. Later a 17-year-old girl is found suffocated in her home, and McCoy, sensing that Darnell is the murderer but short on evidence, sets out to find a legal loophole to ensure Darnell's speedy return to prison. McCoy's persistence -- from 24-hour surveillance to the use of 'Megan's Law' -- brings him dangerously close to abusing his prosecutorial authority.