Rebecca was preparing to audition for The Godfather Part III before her murder (Image: Getty Images) Rebecca Schaeffer, a promising young actress, was murdered by a deranged admirer . The former teenage model began her acting career on the soap opera Guiding Light before landing her breakthrough role in the sitcom My Sister Sam. Prior to her shocking death, she was scheduled to meet Francis Ford Coppola and audition for Mary Corleone in The Godfather: Part III. Rebecca was just 21 and residing in Los Angeles at the time. She was also romantically involved with director Brad Silberling. Her murder later inspired his 2002 film, Moonlight Mile, which explores a man’s anguish following his fiancée’s killing. On July 19, 1989, Rebecca was fatally gunned down by Robert Bardo, an unhinged stalker, at her LA flat. Robert initially became obsessed with Rebecca during her stint on My Sister Sam. Robert penned numerous fan letters to Rebecca, and her psychologist father, Benson Schaeffer, described them as appearing harmless and seeming like correspondence from “just another strange kid …