Morrison, who has studied the psychological histories of the siblings, parents, and some children of the murderers she’s met, has found no violence correlation between the killer and their kin. But most kids of killers seem to disappear into thin air after their parents’ deeds become public, making cohesive research on murderers’ offspring next to impossible. They change their names, move to other cities or countries, and disassociate themselves completely from their families, Morrison says. “No one wants to talk about what they are associated with,” she says.