Bodies of Evidence (1992)

Season 1: Episode 6

As Walt prepares to retire, he looks into a 13-year-old murder case and learns he arrested the wrong man. The department throws Walt a going-away party. Ben teams Ryan with Nora. Ryan hopes to entice Nora romantically, as they investigate a suspicious suicide. Ryan and Nora uncover that the suicide was actually a murder with a dentist for the prime suspect.