“What’s the difference?” Scroggins asked. “Kane?” Thorne put her on the spot. “In spree killing, the identity of the victims is secondary and oftentimes incidental to the act,” Kane recited. “Once they decide to go, spree killers kill who’s available, which we have seen at post offices and schools, acting in response to their anger at something beyond the individual victims in their path. For serial killers, the victims and what they represent to the killer are primary to the act, almost as if they have a relationship that’s personal.”