On this day in 1989, the 21-year-old actress Rebecca Shaeffer is murdered at her Los Angeles home by Robert John Bardo, a mentally unstable man who had been stalking her. Schaeffer’s death helped lead to the passage in California of legislation aimed at preventing stalking.

Schaeffer was born November 6, 1967, in Eugene, Oregon. She worked as a teenage model and had a short stint on the daytime soap opera One Life to Live, but was best known for co-starring with Pam Dawber in the television sitcom My Sister Sam. Bardo, born in 1970, had written Schaeffer letters and unsuccessfully tried to gain access to the set of My Sister Sam, before showing up at her apartment on July 19, 1989. The obsessed fan had reportedly obtained the actress’s home address through a detective agency, which located it through records at the California Department of Motor Vehicles. On the day of the murder, Schaeffer reportedly complied with Bardo’s request for an autograph when he appeared at her home and then asked him to leave. He returned a short time later and the actress, who reportedly was waiting for someone to deliver a script, answered the door again. Bardo then shot and killed her.

Arrested the next day in Tucson, Arizona, Bardo was later prosecuted by the Los Angeles County district attorney Marcia Clark, who later became famous as a prosecutor in the O.J. Simpson trial. In 1991, Bardo was convicted of capital murder and sentenced to life in prison without the possibility of parole. In 1994, California passed the Driver’s Privacy Protection Act, which prevented the Department of Motor Vehicles from releasing private addresses.

The 2002 film Moonlight Mile, loosely inspired by Schaeffer’s story, was written and directed by Brad Silberling, who had been dating the young actress at the time of her death.