Watch S7, EP6: Nathan Matthews with Fubo for $0 Today
A family's worst nightmare occurs when 16-year-old Becky Watts goes missing, and is found dead days later, murdered by her own stepbrother.
A family's worst nightmare occurs when 16-year-old Becky Watts goes missing, and is found dead days later, murdered by her own stepbrother.
How to watch
More episodes
World's Most Evil Killers
S7, EP8 "Adrian Prout"A master manipulator is accused of the murder of his wife, and is eventually caught out by a polygraph test - and his own fiancée.
World's Most Evil Killers
S8, EP9 "Billy Mansfield Jr."Billy Mansfield Jr. moved between Florida and Michigan, targeting vulnerable women and girls.
World's Most Evil Killers
S7, EP1 "Stephen Unwin & William McFall"After striking up a friendship in prison for previous murders, Stephen Unwin and William McFall's release had awful consequences.
World's Most Evil Killers
S8, EP4 "Jerald Wingeart"In January 1973, 20-year-old mother of one Dawn Magyar vanishes while on a shopping trip in Owosso, Michigan.
World's Most Evil Killers
S9, EP20 "Charles Cullen"Nurse Charles Cullen secretly killed patients for years while avoiding scrutiny.
World's Most Evil Killers
S9, EP19 "Joel Rifkin"A traffic stop revealed a body, exposing Joel Rifkin's deadly spree against vulnerable women.
World's Most Evil Killers
S9, EP18 "Westley Allan Dodd"Westley Allan Dodd's escalating predation ended after he murdered three young boys.
World's Most Evil Killers
S9, EP17 "Emanuel Webb"A decade-old link revealed a serial killer who kept the same M.O. after moving far away.
