Over an 18-year period, former Metropolitan Police firearms officer David Carrick sexually assaulted and raped at least 12 women. The force has apologised to victims after it emerged Carrick had come to the attention of police on nine separate occasions, but no action had been taken. On the Sky News Daily, Niall Paterson gets more on the Met's response from Sky's crime correspondent Martin Brunt. Former Met officer Graham Wettone explains how complains against officers are dealt with, and Harriet Wistrich, director of the Centre for Women's Justice, explains why she believes those investigating police culture need to be given more power to uncover the truth. Podcast producer: Rosie Gillott Interviews producer: Tamara Bungaroo Valdes Podcast promotions producer: David Chipakupaku Editor: Philly Beaumont