Motivations - Revenge

Steve "Clem" Grogan was a member of Charles Manson's Family who participated in the 1969 murder of Spahn Ranch worker and stuntman Donald "Shorty" Shea. Already living and working around the ranch before becoming closely associated with Manson, Grogan joined Manson and fellow Family member Bruce Davis in the attack on Shea after Manson came to believe the ranch hand was an informant. Grogan was convicted of first-degree murder in 1971 and initially sentenced to death, but the trial judge reduced his punishment to life imprisonment. Years later, Grogan cooperated with authorities and led investigators to Shea's concealed remains. He was paroled in 1985, becoming the first Manson Family member convicted of murder to be released from prison.

Bradley Clifford is a British convicted murderer responsible for a fatal road-rage killing in Enfield, North London, in 2017. His crime involved a sustained and deliberate act of violence following a perceived slight, resulting in the death of an 18-year-old victim. He was later convicted of murder and sentenced to life imprisonment, with the case highlighting how rapidly uncontrolled anger can escalate into lethal violence in a public setting.

Aileen Wuornos was an American serial killer who murdered multiple men in Florida between 1989 and 1990. Operating primarily along highways, she targeted men she encountered while working as a sex worker. Her case gained widespread attention due to her background, her claims of self-defense, and the rarity of a female serial killer receiving the death penalty. Wuornos was convicted of multiple murders and executed in 2002.