Power and control: The killer enjoys dominating a victim’s fear, suffering, and survival. This is among the most common motives.
Sexual gratification: Violence, humiliation, or the victim’s helplessness becomes connected to sexual arousal.
Fantasy fulfillment: Rehearsed fantasies gradually become more elaborate, and murder is used to make them real.
Thrill seeking: The planning, pursuit, danger, and act of killing provide excitement.
Anger or revenge: Victims symbolize someone—or an entire group—the killer resents. The victims may have done nothing personally to the offender.
“Mission” thinking: The killer believes certain people are undesirable and should be eliminated, such as sex workers or members of another group.
Financial gain: Victims are killed for insurance, inheritance, property, or other material benefits.
Attention and recognition: Some killers crave publicity, contact journalists or police, leave clues, or enjoy creating public fear.
Comfort or convenience: A person kills those perceived as burdens or obstacles, sometimes while claiming the deaths were merciful.
Psychosis or delusion: A small minority kill because they believe voices, visions, supernatural forces, or persecutors are commanding them. Psychosis is not a typical explanation for serial murder.
Avoiding discovery: Later victims may be killed to silence witnesses, conceal earlier crimes, or preserve the killer’s secret life.
Attachment and possession: The killer interprets ownership, obsession, or permanent control as love: If I cannot keep you, no one will.