About Cathy Smith
Catherine Evelyn Smith (April 25, 1947 – August 16, 2020), also known as Silverbag, was a Canadian backup singer, groupie, drug dealer, and legal secretary. Smith served 15 months in the California Institution for Women for injecting actor John Belushi with a fatal dose of heroin and cocaine in 1982. Smith had been paid for a front-page headline story in the Hollywood tabloid the National Enquirer, where she stated she was the person who injected Belushi with a fatal drug overdose. Smith co-wrote the book Chasing the Dragon (1984) which told her life story; its title alludes to Smith's heroin addiction. Smith appeared prominently in the Bob Woodward book Wired: The Short Life and Fast Times of John Belushi (1984) and was played by Patti D'Arbanville in the 1989 film adaptation. In his autobiography, Helm recalls that he first met Smith in Hamilton, Ontario. Smith became an employee (and, later, mistress) of Canadian singer-songwriter Gordon Lightfoot in the early to mid-1970s.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.