Serial killers have tested out a number of excuses for their behavior. Henry Lee Lucas blamed his upbringing; others like Jeffrey Dahmer say that they were born with a "part" of them missing. Ted Bundy claimed pornography made him do it. Herbert Mullin, Santa Cruz killer of thirteen, blamed the voices in his head that told him it was time to "sing the die song." The ruthless Carl Panzram swore that prison turned him into a monster, while Bobby Joe Long said a motorcycle accident made him hypersexual and eventually a serial lust killer. The most psychopathic, like John Wayne Gacy, turned the blame around and boasted that the victims deserved to die. They must be insane - what normal person could slaughter another human, for the sheer pleasure of it? Yet the most chilling fact about serial killers is that they are rational and calculating. As the "British Jeffrey Dahmer" Dennis Nilsen put it, "a mind can be evil without being abnormal." We will journey into the lives and crimes of some of America's most notorious serial killers. We will look at their lives and the horrific crimes that they committed that made them "America's Monsters."