Michael Skakel — the Kennedy cousin who spent more than a decade in prison for the 1975 murder of his teenage Connecticut neighbor before he was sprung on procedural grounds — is suing the town of Greenwich and its lead police investigator over claims he was locked behind bars in a targeted attack. The lawsuit claims investigators pinned the slaying on Skakel for their own personal and financial gain. Skakel, a nephew of Robert F. Kennedy’s widow, Ethel Kennedy, was convicted of 15-year-old Martha Moxley’s murder in 2002 and sentenced to 20 years to life in prison, but was released...