THE shocking murder of Rachel Nickell – stabbed 49 times while holding her two-year-old son – prompted a public outcry that saw cops use extreme measures to try to catch her killer.
Police used a female undercover officer, codenamed Lizzie James, to try to make prime suspect Colin Stagg fall for her and admit to attacking the young mum on Wimbledon Common, South London in 1992.
But they had the wrong man and the controversial methods only ended with the case sensationally collapsing. Meanwhile the real killer, Robert Napper, claimed two more victims before he was caught.
Read more on thesun.co.uk