Paul Lingnau, 62, was shot to death on the evening of March 12, 1984, in Royal Oak, Michigan. He sustained multiple wounds from a semi-automatic handgun and was found dead just days before he was to testify in court as a key witness against a former girlfriend, Debra Lynn Starr, in alleged financial crimes. The relationship had soured amid accusations that Starr, then 24, had embezzled about $10,000 from Lingnau, forged checks, stolen his vehicle, and tried to file fraudulent insurance claims.

Investigators and family immediately suspected Starr, but physical evidence tying her to the scene was minimal and the murder weapon was never found, leaving the case cold for years. Later developments in the 1990s brought new witness testimony that Starr had solicited an ex-boyfriend, identified as Steven Steiner, to shoot Lingnau and had boasted about arranging the killing. The indictment and conviction of Starr occurred well after the homicide.

Did anyone who knew Paul or who lived in Royal Oak in 1984 see or hear anything that could still help explain what happened that night?