Luka Magnotta is a Canadian convicted murderer and former pornographic film actor. He was arrested for murdering Jun Lin, an international student from Wuhan. The murder was sensationalized by the media as Luka Magnotta mailed the victim's feet and hands to federal political party offices and elementary schools. The murder inspired a three-part documentary series titled Don't F**k with Cats.
Karla Homolka raped and killed three minors along with her ex-husband Paul Bernardo. After their arrest, Bernardo was sentenced to life imprisonment, while Homolka served 12 years in prison following a plea bargain. Although she had claimed that she was an unwilling accomplice to the killings, a videotape that surfaced after the plea bargain suggested otherwise, resulting in public outrage.
Alvin Karpis was a criminal best remembered for leading the infamous Barker-Karpis gang in the 1930s. Renowned for his sinister smile, Karpis, who was nicknamed Creepy, was captured by the FBI in 1936. He was then sentenced to life imprisonment and was released on parole in 1969. He spent his later years writing memoirs like The Alvin Karpis Story.