John Diacone, 40, was shot in the head at point-blank range on July 20, 1993, outside Highland Park in Queens. His killing was one in a string of seemingly random attacks attributed to a person who styled himself after the California Zodiac Killer and targeted victims based on zodiac signs.

Investigators eventually linked the series of shootings and stabbings to Heriberto Seda, a Brooklyn resident in his late twenties at the time, who left cryptic notes and exhibited an obsession with astrology. A handwriting match to letters sent to police and the New York Post emerged after Seda was connected to a separate domestic shooting on June 18, 1996, which led to his arrest and charges that included Diacone’s murder.

Court proceedings resulted in a jury conviction on June 24, 1998, finding Seda guilty of three murders and several attempted murders; he received a 232-year prison sentence. Did anyone in Queens around Highland Park in July 1993 notice anything that could still shed light on Diacone’s last hours?