Part-time model Rachel Nickell, 23, was walking through Wimbledon Common on a summer’s day in July 1992 when she was sexually assaulted and stabbed 49 times.
No one saw what happened, though her distraught two-year-old son Alex was later found by a dog walker clinging to her blood-soaked body.
Thus began one of the most error-strewn investigations carried out by London’s Met Police – a case which was finally resolved 16 years later.
Detectives have since been forced to admit they could have arrested her assailant, serial sex attacker Robert Napper, much sooner, and possibly even before he killed Nickell and two other victims, another young mother and her daughter.
On Thursday ITV will air Rachel Nickell: The Untold Story, which will feature exclusive interviews with those involved in the case…