弑亲又名伦常命案、逆伦惨案，是指杀害自己家族成员的事件，例如弑父母及杀子女等。

• 精神失常，例如思觉失调。
• 极端思想、主义，例如为国家、为民族，以「大义灭亲」之名。
• 宗教、驱魔，如名誉杀人
• 迷信天国比现实更美好。
• 把家庭成员视为个人财产。
• 无力供养家人
• 借钱不果
• 家暴致死

A familicide is a type of murder or murder-suicide in which at least one spouse and one or more children are killed, or in which a parent or parents and possibly other relatives such as siblings and grandparents are killed. In some cases all of the family members' lives are taken. If only the parents are killed, the case may also be referred to as a parricide. Where all members of a family are killed, including when the killing takes the form of a murder-suicide, the crime may be referred to as family annihilation.