• The
Criminal Code of Japan once determined that patricide brought
capital punishment or
life imprisonment. However, the law was abolished because of the trial of the
Tochigi patricide case in which a woman killed her father in 1968 after she was sexually abused by him and bore their children. •
Charles Whitman killed his mother and his wife before climbing the bell tower at UT-Austin and randomly killing people in 1966. Upon autopsy he was found to have a tumor on his amygdala. •
Lyle and Erik Menendez both killed their parents in 1989 due to fear that their parents were plotting to kill them. •
Dana Ewell hired two of his friends to murder his father, mother and sister in 1992. All three were convicted of murder. •
Kip Kinkel killed his parents before committing the
Thurston High School shooting in 1998. •
Suzane von Richthofen killed her father and her mother with the help of her boyfriend and his brother in
São Paulo in 2002. •
Nicole Kasinskas killed her mother with the help of her boyfriend in 2003. •
Sarah Marie Johnson was the only female to kill both of her parents without the help of an accomplice in 2003. •
Thomas Bartlett Whitaker killed his mother and his brother (and tried to kill his father but failed) in 2003. •
Tyler Hadley killed both of his parents on July 16, 2011. •
Adam Lanza killed his mother before committing the
Sandy Hook Elementary School shooting in 2012. •
Dellen Millard killed his father in 2012 and inherited millions. He and his friend Mark Smich worked together as serial killers both before and after the murder; murdering Laura Babcock and Tim Bosma. •
Henry Chau Hoi-leung killed and dismembered his parents in 2013. •
Robert and Michael Bever killed their parents and 3 siblings in 2015. •
Joel Michael Guy Jr. killed and dismembered both of his parents on the Saturday after Thanksgiving in 2016. • A 21 year old Turkish man in
Bayraklı, İzmir who was studying chemistry, killed his parents by making them drink the
cyanide sharbat he had prepared in May 2019. •
Chandler Halderson killed and dismembered both of his parents on July 1, 2021. • A 19 year old Japanese man in Tosu,
Saga Prefecture, killed his parents by stabbing them with a knife in the neck on March 9, 2023. • David Kozák murdered his father before carrying out the
2023 Prague shootings. •
Jennifer Pan orchestrated
kill-for-hire plot targeting her parents in 2010. •
Nick Reiner allegedly killed both of his parents in 2025. The case is notable due to the fame of his father,
Rob Reiner. • Loren Krauss admitted to killing his parents in a bizarre TV interview in 2025, claiming they were losing their quality of life. •
Christopher Porco killed his father and attempted to kill his mother with an axe in their beds in 2004. •
Grant Amato stole over $200,000 from his family to send to a
Bulgarian cam model. After he was confronted, he killed his parents and brother. == Notable historical cases ==