Mental Profile - Psychopathy

Richard Benjamin Speck became one of America's most infamous mass murderers after murdering eight student nurses during a single night in Chicago, Illinois, on July 13–14, 1966. The attack at a South Side townhouse generated worldwide attention and became one of the most notorious crimes in American history. Speck was convicted of eight counts of murder and sentenced to death, although his sentence was later commuted to imprisonment following changes to U.S. capital punishment laws. He died in prison in 1991.

Tommy Lynn Sells became one of America's most infamous serial killers after murdering victims across numerous states over nearly two decades. Nicknamed the "Coast-to-Coast Killer," Sells confessed to dozens of murders, although investigators have verified only a portion of his claims. He was convicted of the 1999 murder of 13-year-old Kaylene Harris in Texas and sentenced to death. Sells was executed in 2014.

Lindsey Robert Rose is an Australian serial killer who murdered five people in New South Wales between 1984 and 1994. His victims included acquaintances and vulnerable individuals who were killed over a ten-year period before advances in forensic science and renewed investigations linked Rose to the crimes. Following his conviction, he was sentenced to five terms of life imprisonment without the possibility of parole and remains incarcerated.

Wayne Clifford Boden became one of Canada's most infamous serial killers after sexually assaulting and murdering four women in Montreal, Quebec, between 1969 and 1971. Dubbed the "Vampire Rapist" by the media because he bit several victims during the attacks, Boden became one of the first Canadian killers to be convicted using bite-mark evidence. He was sentenced to life imprisonment and remained incarcerated until his death in 2006.

Roy Lewis Norris became one of America's most infamous serial killers after murdering five teenage girls alongside accomplice Lawrence Bittaker during a five-month killing spree across Southern California in 1979. Working together in a customized van known as the "Murder Mac," the pair abducted vulnerable teenage girls before murdering them and disposing of their bodies in remote locations. After his arrest, Norris agreed to testify against Bittaker in exchange for avoiding the death penalty and was sentenced to life imprisonment without the possibility of parole.

Lawrence Sigmund Bittaker became one of the most infamous serial killers in American history after murdering five teenage girls alongside accomplice Roy Lewis Norris during a five-month period in Southern California in 1979. Operating from a customized van that became known as the "Murder Mac," the pair targeted runaway and hitchhiking teenagers before killing them and disposing of their bodies in remote mountain areas. Bittaker was convicted of five murders and sentenced to death, remaining on California's death row until his death in prison in 2019.

Joel David Rifkin became one of the most infamous serial killers in American history after murdering at least 17 women in New York between 1989 and 1993. Most of his victims were women involved in sex work or struggling with substance abuse, many of whom initially disappeared without attracting widespread attention. Rifkin's crimes ended following a routine traffic stop that led police to discover the body of his final victim in his vehicle. He was later convicted of multiple murders and sentenced to more than 200 years in prison.

Fred Waterfield became one of Florida's most infamous serial killers after participating in a series of abductions and murders alongside his cousin, David Alan Gore, during the early 1980s. The pair targeted young women across Indian River County, with Waterfield acting as an accomplice in several kidnappings, sexual assaults, and murders. Following his arrest, Waterfield cooperated with investigators and testified against Gore, helping prosecutors secure convictions in one of Florida's most notorious serial murder cases.