Neilson and Nilsen: Portraits of Britain's Most Notorious Killers

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"Donald Neilson, aka The Black Panther. Was responsible for over 400 house burglaries. Between 1971 and 1974, Neilson robbed 18 sub-post offices, breaking into them in the night. In 1974, Neilson committed three murders during his post office robberies, killing two sub-postmasters and the husband of a sub-postmistress during robberies in Harrogate in North Yorkshire, Baxenden in Lancashire, and Langley, West Midlands respectively. On January 14, 1975, he kidnapped Lesley Whittle, an heiress from Highley, Shropshire. She would later die in his captivity. He was convicted of four counts of murder, and sentenced to life imprisonment in July 1976. He died at Norfolk and Norwich University Hospital after being transferred there from Norwich Prison on December 17, 2011, aged 75. THE BLACK PANTHER is based on his crimes. 

"Dennis “Des” Nilsen, aka The British Jeffrey Dahmer. Killed at least twelve young men and boys in his two North London flats between 1978 and 1983. He also attempted to kill seven more and initially confessed to there being 15 victims, but later recanted his story, saying the 3 additional murders never took place. He was convicted of the murders of six men and two attempted murders on November 4, 1983 and sentenced to life imprisonment. He died at York Hospital on May 12, 2018, aged 72. COLD LIGHT OF DAY is based on his crimes." -Spectacle