In episode 3, the primary suspect is interrogated by police until he confesses. But it's not until 30 years later that the right man is put on trial

Sharon's case should be extraordinary but it isn't. A few miles away from Sharon another mother was left to solve her own daughter's murder after being let down by police.

The police say they are not looking for any more victims of David Boyd but we met other women who were confronted by the killer.