Mass murderers, serial killers, spree killers, homicidal rapists and other human predators; 20th century history is poxed with the apparently motiveless acts of violence and mayhem perpetuated by these psychopathic outsiders. Carl Panzram Jeffrey Dahmer, John Wayne Gacy, Ted Bundy, Charles Manson; Bad Blood examines the crimes of these and 40 other killers and the films inspired by their repellant yet fascinating pathologies. A trip into not only the darkest recesses of human existence, but also into one of the most exciting and disturbing zones of cinema.