Betty Broderick, the California woman convicted of killing her ex-husband and his new wife in 1989, dies in prison at age 78, authorities say. Multiple outlets report that Broderick was serving a life sentence for the murders of her ex-husband and his wife, who were asleep in their bed at the time of the killings. The New York Times and other coverage note that the case became widely known and generated extensive media and cultural attention, including TV adaptations, podcasts, and books. The Guardian adds that she was transferred to a medical center in mid-April and died a few days later, according to representatives from the California Department of Corrections and Rehabilitation. NBC News and the Los Angeles Times similarly state that prison officials confirm her death while she remains under California custody. According to the Times, Broderick characterized her actions as the result of years of psychological abuse, a detail mentioned as part of her account during the trial process. No source cited here disputes her conviction or the prison-based circumstances of her death.