On Wednesday 3 March, Sarah Everard, a 33-year-old marketing executive, set off home from her friends’ house in Clapham, South London at 9 pm. Her house in Brixton was just a 50-minute walk away and CCTV from a private doorbell camera shows Everard walking alone down the A205 Poynders Road, just south of Brixton at 9.15 pm. But it is unclear if she ever made it home.