In May 2009, a photo from video provided by the Brooklyn District Attorney’s office shows Thomas Parkin, 49, at left, on a Department of Motor Vehicles security camera, dressed up as his mother, who died in 2003, as part of a scam to collect her government benefits.

Robert Zarinsky was a convicted murderer and suspected serial killer from Linden, New Jersey.

José Dorángel Vargas Gómez known as "El comegente" ( people eater) and the "Hannibal Lecter of the Andes," is a serial killer and cannibal in Venezuela. He was a homeless man who used to hunt passersby at a park in the city of San Cristobal, Táchira. Once he was caught, he confessed to killing and eating at least eleven men over a period of two years preceding his arrest in 1999.

A decade before the Claremont serial killings, a series of murders by the Birnies were among the most macabre and sadistic crimes in history.

Jake Bird was an American serial killer who was tried and executed for the ax murders of Bertha Kludt and her daughter Beverly June Kludt in Tacoma, Washington, in 1947 and has since been linked to 11 other homicides across several states. It is also suspected that Bird may have killed as many as 46 people.

In 1920, a woman was fished out of a lake claiming to be the Grand Duchess Anastasia of Russia. Did the princess really escape death, or was it the ramblings of a madwoman?

Antoinette Renee Frank is a former officer of the New Orleans Police Department (NOPD) who, on March 4, 1995, committed a violent armed robbery at a restaurant which resulted in the killing of two members of the family who ran the establishment, and fellow NOPD officer Ronald A. Williams II. She was aided by her probable lover, drug dealer Rogers Lacaze. Frank currently resides at the Louisiana Correctional Institute for Women in St. Gabriel, Louisiana, the only woman on the state's death row.

Lawrencia Ann "Bambi" Bembenek, known as Laurie Bembenek, was an American police officer convicted of murdering her husband's ex-wife. Her story garnered national attention after she escaped from Taycheedah Correctional Institution and was recaptured in Thunder Bay, Ontario, Canada, an episode that inspired books, movies, and the slogan "Run, Bambi, Run". Upon winning a new trial, she pleaded no contest to second-degree murder and was sentenced to time served and ten years' probation in December 1992. Four years later, she sought to have the sentence overturned.

The Bath School Bombing, also known as the Bath School massacre and The Bath School disaster, was a series of violent attacks perpetrated by Andrew Kehoe on May 18, 1927, in Bath Township, Michigan, United States. The attacks killed 38 elementary schoolchildren and 6 adults, and injured at least 58 other people. Prior to his timed explosives detonating at the Bath Consolidated School building, Kehoe had murdered his wife, Nellie Price Kehoe, and firebombed his farm. Arriving at the site of the school explosion, Kehoe died when he detonated explosives concealed in his truck.

The killer behind the UK’s worst mass shooting who murdered 16 primary school children in Dunblane in Scotland in 1996 planned the massacre from his mother’s bath.