Anger and Revenge
We divided this category into three subtypes: Targeted; Targeted and Random-Opportunistic; and Random-Opportunistic. In other words, some spree killers who have a grudge or seek revenge know exactly who they want to kill, while others have a more generalized need to act out or punish. In some cases, they target one or more people but then extend their spree randomly or in an opportunistic circumstance. We use ‘opportunistic’ to indicate that people became victims because of where they were rather than who they were. They might have worked at a targeted workplace, for example, or attended a targeted place of worship. “Random” denotes that anyone along the path of a spree can be a target; they’re just in the wrong place at the wrong time.