Netflix’s latest true-crime documentary, The Murder of Rachel Nickell, explores one of the most shocking murder cases in Britain. The documentary was released on June 4. It examines the murder of 23-year-old Rachel Nickell, and the investigation that followed. The film also depicts the impact of the crime on Rachel’s family, including her young son, who witnessed the attack. Robert Napper, a serial rapist, was free and continued to perpetrate horrific crimes until ten years later, DNA evidence connected him to Rachel Nickell’s murder. (Netflix) As interest in the case grows after the release, many viewers are asking the same question: “Why did Robert Napper kill Rachel Nickell?” What happened to Rachel Nickell? On July 15, 1992, Rachel Nickell was walking across Wimbledon Common in southwest London with her two-year-old son, Alex, and their dog. During the walk, she was attacked and murdered. The only witness was Nickell’s son Alex, who was just two at that time. This complicated the investigation. The officers initially focused on Colin Stagg, who was later found not guilty after …