 The case Lilly Rush is investigating in this episode is eerily  similar to a cold case that occurred in Greenwich, Connecticut, the  1975 murder of Martha Moxley. Michael Skakel, Ethel Kennedys  nephew, was convicted in 2002 of bludgeoning her to death with a  golf club when they were both 15. His brother had also been a  suspect. In this episode, a teenage girl is killed in 1976 in a  wealthy suburb with a tennis racket. Years later, someone claiming  to have witnessed the murder comes forward. Two brothers were  suspects in the case, but were not charged, given their high  connections in society.