May be disruptive, externalizes hurt, anger and pain. May have been a bully or hanged with the wrong crowd. May have been good at school work, but will never finish school. Disorganized Killer - Fathers work is unstable. Discipline is harsh.
Family has problems with drugs, alcohol, mental illness, etc.
May be the silent type and internalizes hurt, anger and pain. Will be of low intelligence. Will not finish school as they are terrible at it. These are the keypoints in a serial killers life after their youth and when they are killing or may soon do so. These keypoints also apply to homosexual serial killers as I did refer to the keypoints as heterosexuals but homosexual serial killers are also applicable.