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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, 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
S5, EP4 "Russell Bishop"A look at the man convicted of sexually assaulting and murdering two nine-year-old girls in 1986.
Britain's Most Evil Killers
S6, EP2 "Trimaan Harry Dhillon"A killer attacks his ex-girlfriend in a jealous frenzy and commits a brutal murder after a campaign of harassment.
Britain's Most Evil Killers
S6, EP4 "Sarah Williams & Katrina Walsh"Sarah Williams and Katrina Walsh, the two friends carry out the jealousy-fuelled murder of Sadie Hartley.
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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.
