Betty Broderick died in prison at age 78 on May 8, 2026 while serving a life sentence for shooting her ex-husband Dan and his new wife Linda in their bed in 1989. The story is confirmed by multiple major outlets including NBC News, People, USA Today, and local Denver news. Her death ends a high-profile case that gained national attention in the late 1980s and inspired a Netflix series, though the post's headline emphasizes the dramatic nature of the crime rather than context about her decades-long incarceration or health status at time of death.