In January, Reynhard Sinaga was convicted of 159 sexual offences against 48 different men over the course of four trials. But according to police, there’s evidence he abused more than 200 men whilst living as a student in Manchester. He preyed on vulnerable young men, drugged them until they were unconscious and raped them while recording most of his abuse on his phone. Most of his victims woke up with no memory of what had been done to them - oblivious until the police turned up at their doors to explain the horrific truth. As police renew their efforts to identify more of Sinaga's victims, File on 4 has been given exclusive access to those at the centre of the police investigation and hears from many of those who knew him and who have never spoken before. The programme hears how how the softly spoken and highly intelligent student played Good Samaritan to lure victims to his flat in central Manchester - then plied them with drinks laced with the date rape drug GHB. How one man fought off Sinaga and called police, triggering the biggest rape inquiry in British history. The programme also hears about the moment the police realised they were dealing with a monster when they accessed his phone and discovered a catalogue of videos he'd made of himself abusing his unconscious victims. Police then painstakingly trawled through hours and hours of video and numerous trophies found in Sinaga's flat to help identify his victims. Having never shown any remorse for his crimes, the Court of Appeal is now reviewing Sinaga's sentence. So will he become the UK’s first non-homicide criminal to die behind bars? If you have information about this case you believe may be of interest to police you can contact them here: https://mipp.police.uk/operation/06GMP19V24-PO2 If you have been affected by any of the issues raised in this programme you can access support via the following organisations: St Mary’s Rape Crisis Centre in Manchester provides a range of support and services 24 hours a day, 365 days a year to people of all ages who have been sexually abused, assaulted or raped, whether this happened in the past or more recently. https://www.stmaryscentre.org Safeline provides support and counselling for survivors of sexual abuse or rape. Phone: 0808 8005005 (Male support) www.safeline.org.uk Survivors UK run the National Male Survivors Online Helpline and Webchat Service for men who have experienced sexual abuse either as a child or an adult. www.survivorsuk.org The Survivors Trust provides support and signposting for women, men and children who are survivors of rape, sexual violence or childhood sexual abuse. Phone: 0808 801 0818 www.thesurvivorstrust.org Samaritans is available for anyone struggling to cope and provide a safe place to talk 24 hours a day. Phone: 116 123 Email: jo@samaritans.org www.samaritans.org BBC Action Line: Sexual abuse and violence: https://www.bbc.co.uk/programmes/articles/22VVM5LPrf3pjYdKqctmMXn/information-and-support-sexual-abuse-and-violence