extended suicide
n.β Β«Suicide is usually a solitary act. But in rare cases, people who are depressed and planning to take their own livesβas appears to have been the case with Virginia Tech gunman Cho Seung-Huiβcommit what some psychiatrists call “extended suicide.” This usually involves killing family membersβfathers are a favourite targetβbut in a small percentage of cases the victims are strangers or people the slayer barely knew.Β» ββRevenge, βextended suicideβ reasons for rampages” by Anne Mcilroy Globe and Mail (Toronto, Canada) Apr. 19, 2007. (source: Double-Tongued Dictionary)