Maggie Oliver said her professional life was made torture" after she told senior officers that police were not doing enough to protect girls from a predominantly Asian paedophile ring. The former detective constable resigned from Greater Manchester Police in late 2012 over failures that allowed the Rochdale perpetrators to escape justice for many years. However before she quit she alleges she was bullied for a year and a half while working on Operation Span, the investigation into Rochdale. She has now decided to speak out to support another detective John Wedger who the Sunday Express revealed last week is suing the Metropolitan Police for a psychiatric injury he suffered as a result of bullying. Ms Oliver was tasked with gaining the trust of vulnerable but hostile victims. However, when they began to identify Asian grooming gangs, she said the police cooled their interest in the investigation. She said: "GMP had a specialist interview suite for vulnerable victims. "Yet I remember one senior officer screaming down the phone at me telling me that I had to take vulnerable victims to a suspect interview suite where some of them had been taken previously when they were accused of something they hadn't actually done." Ms Oliver claimed the harassment stepped up when she was off work with stress. She said: "Two senior colleagues turned up at my house one day and demanded that I surrender the police phone I'd had for 15 years. "It was ... another attempt to isolate me further and shut me up."