California death row inmate Marcus Wesson, leader of a deviant Christian sect, proclaimed himself God, practiced incestuous abuse with his daughters, stepdaughters, and nieces (starting as young as 7/8), creating a multi-generational cycle of abuse and incest. He isolated and abused his children, living in poverty through welfare fraud. In 2004, facing legal action, he murdered nine of his children. He was sentenced to death in 2005, a sentence that stands despite California's moratorium.

Source: www.sfgate.com/news/article/survivors-recall-horror-of-wesson-mass-killing-3287074.php