Motivations - Ideological

Adolf Eichmann became one of the most infamous figures of the Holocaust as a senior SS officer responsible for coordinating the deportation of millions of Jews and other persecuted groups to Nazi ghettos and extermination camps during the Second World War. Following Germany's defeat, Eichmann fled Europe and lived under a false identity in Argentina before being captured by Israeli intelligence in 1960. He was convicted of crimes against humanity, war crimes, and crimes against the Jewish people before being executed in 1962.

Bruce McGregor Davis was a prominent member of Charles Manson's Family who was convicted for his involvement in the 1969 murders of musician Gary Hinman and Spahn Ranch worker Donald "Shorty" Shea. Davis joined Manson's group during the late 1960s and participated in crimes committed around the period of the notorious Tate-LaBianca murders, although he did not participate in those killings. After spending more than a year as a fugitive, Davis surrendered in 1970 and was convicted in 1972 of two counts of first-degree murder and conspiracy to commit murder and robbery. Originally sentenced under California's indeterminate life-sentence system, he has spent decades in prison, where he became a born-again Christian, pursued higher education and repeatedly sought parole.

Patrick Crusius is an American mass murderer responsible for the 2019 El Paso Walmart shooting in Texas. The attack was premeditated and motivated by extremist ideological beliefs. He was arrested shortly after the incident and later convicted on multiple federal charges, receiving life sentences without the possibility of parole.

Elliot Rodger was an American mass murderer responsible for the 2014 Isla Vista killings in California. He carried out a planned multi-location attack targeting individuals in a university community. He killed six people and injured others before dying by suicide at the scene.

Jim Jones was an American cult leader and founder of the Peoples Temple, best known for orchestrating the mass murder-suicide in Jonestown, Guyana, in 1978. He established a following based on religious and social ideals, eventually relocating his group to a remote settlement where he exerted extreme psychological control over members. Jones’ leadership became increasingly authoritarian and paranoid, culminating in the deaths of over 900 people, including children, after he directed followers to consume a poisoned drink. The incident remains one of the largest mass deaths in modern history and cemented Jones as one of the most infamous cult leaders of all time.

Timothy McVeigh was an American domestic terrorist responsible for the 1995 Oklahoma City bombing. Motivated by anti-government ideology, he carried out a large-scale bombing targeting a federal building. He was arrested shortly after the attack, convicted on multiple federal charges, and executed in 2001.

Leslie Louise Van Houten was a member of Charles Manson's Family who participated in the murders of Leno and Rosemary LaBianca during the second night of the infamous Manson Family killings in August 1969. Under Manson's direction, she joined Charles "Tex" Watson and Patricia Krenwinkel in attacking the LaBiancas inside their Los Feliz home. Van Houten was convicted of two counts of first-degree murder and conspiracy to commit murder after multiple trials and originally sentenced to death before California's death penalty was invalidated. She spent more than five decades in prison before being released on parole in 2023 after numerous successful parole recommendations and legal challenges.

Patricia Dianne Krenwinkel was one of Charles Manson's most devoted followers and participated directly in the Tate-LaBianca murders that left seven people dead over two nights in August 1969. At the Tate residence, she chased and repeatedly stabbed Abigail Folger, and the following night participated in the murders of Leno and Rosemary LaBianca, later using their blood to write messages at the crime scene. Krenwinkel was convicted in 1971 of seven counts of first-degree murder and conspiracy to commit murder and sentenced to death, which was reduced to life imprisonment after California temporarily abolished capital punishment. She has spent more than five decades in custody, becoming California's longest-serving female prisoner. Although parole boards have repeatedly found her suitable for release in recent years, Governor Gavin Newsom most recently reversed a parole grant in October 2025, finding that she continued to pose an unreasonable danger to society.