Why Did Jeffrey Dahmer Pose And Photograph His Victims? While the method of operation, also known as modus operandi consists of techniques, habits, and peculiarities consistent in serial killer’s behavior, the investigators may also encounter deliberate alterations of the crime scene or the position of victim’s body. Jeffrey Lionel Dahmer (May – November ), A.K.A. Milwaukee Cannibal, was a serial killer and sex offender, who committed the rape, murder, and dismemberment of seventeen men and boys between and Many of his murders involved necrophilia, cannibalism, and the permanent preservation of body parts. Although . The Crime Scene at the Arrest: Jeffrey Dahmer's Fridge and Polaroids Dahmer's killing spree ended when he was arrested on July 22, That day, two Milwaukee police officers picked up Tracy Edwards, a year-old African American man who was wandering the streets with a handcuff dangling from his wrist. They decided to .