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A woman murders her sister after developing a deadly obsession with her brother-in-law.
A woman murders her sister after developing a deadly obsession with her brother-in-law.
More episodes
Britain's Most Evil Killers
S6, EP9 "Mark Martin: The Sneinton Strangler"The story of Mark Martin, who murdered three homeless women in his quest to become Nottingham's first serial killer.
Britain's Most Evil Killers
S5, EP8 "Colin Pitchfork"Colin Pitchfork is the first person to be convicted of murder based on DNA fingerprinting evidence.
Britain's Most Evil Killers
S1, EP3 "Ian Huntley"Ian Huntley murdered two 10-year-old girls in a case that changed the course of British policing.
Britain's Most Evil Killers
S6, EP5 "Lee Ford"Lee Ford kills his wife and four stepchildren in a cold-blooded murder spree over 24 hours in September 2000.
Britain's Most Evil Killers
S9, EP2 "Gavin McGuire"Teen Mhairi is killed on her walk home after a festive night; investigators trace her last steps, using CCTV and forensics that point to Gavin, a violent repeat offender whose history reveals how dangerous he truly is.
