Mystery in Florida

S7, E5: Williamson Case: Lester Williamson had just moved into a new home and was ready for retirement, but his cold blooded murder put an end to those plans. Soon investigators zero in on his old roommate who, after a bitter falling out, seemed to have plenty of motive to kill. But when his alibi checks out, Special Agent Hinman reviews the case and breathes new life into the investigation.