Overview : looking at the numbers -- Multiple killers : mass murderers and serial killers -- Juvenile killers : children out of control -- "Crazy" killers : saving children from pain -- Violent abuse and sudden attacks : outbursts of rage -- Death after sustained abuse : killing without remorse -- Wrong place / wrong time and bad decisions : unintended victims -- Research problems and causal explanations : a discussion of key factors -- Recommendations : where do we go