Reynhard Sinaga lured over 190 men from outside Manchester clubs to his apartment, where he drugged and sexually assaulted them.

On Monday, Sinaga was sentenced to prison for life with a 30-year minimum for 159 sex offenses, including 136 rapes.

A spokesperson for Greater Manchester Police said: “For operational reasons we are unable to give out specific numbers of calls made to the incident room or information made online via the Major Incident Public Portal at this time. However, we can confirm that some of these reports relate to potential further victims of Sinaga.”

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Sinaga would lurk around nightclubs and bars waiting for men before bringing them to his flat often offering to a place to have drinks or call a taxi. He would drug his victims before sexually assaulting them while they were unconscious, and even filmed the attacks. When the victims woke up, many of them had no recollection of what took place.

In court, victims admitted various troubles that came as a result of the incidents. One victim dropped out of his university, another left his job. One who struggled to speak with his family on the incident, and another who even thought about suicide. Only after hearing these accounts do you realize the impact of these crimes.

Police believe the victims of Sinaga of at least 190 victims, but are unable to identify 70 of them. Now they are asking for other victims to speak up.

The Crown Prosecution Service said Sinaga is “the most prolific rapist in British legal history” after he was jailed Monday.