How a muddy footprint bungled Rachel Nickell’s murder investigation – and led to two more killings

Rachel was out with her dog and toddler son Alex when she was murdered on Wimbledon Common in 1992 (Picture: Courtesy of Netflix)

Rachel Nickell was walking her dog Molly with her two-year-old son Alex when she was brutally stabbed to death on Wimbledon Common on 15 July 1992.

An unknown man approached from behind, pushed Alex aside, stabbed Rachel 49 times and sexually assaulted her.

Her toddler was the only witness in a case that truly shook the nation.

The little boy watched the assailant wash his hands in a nearby stream before leaving, then clung to his 23-year-old mother’s body until they were found.

Officers who arrived at...