The document discusses three serial murderers - Carroll Edward Cole, Jeffery Lionel Dahmer, and Charles Manson - and analyzes their life experiences and crimes through various criminological theories. Cole engaged in animal cruelty as a child and his crimes are explained by social learning theory. Dahmer also had a history of animal cruelty and labeling theory is used to understand his acts. Manson's childhood experiences of abandonment and institutionalization led him to murder according to general strain and social control theories. The document provides references analyzing the application of these theories to understand the motivations behind their serial killings.