The mother of Britain’s most prolific rapist has said he is still “my baby” and she struggles to believe he was capable of his crimes.

Reynhard Sinaga, 36, was convicted of 159 sexual offences against 48 men who were lured back to his flat in Manchester before being drugged and attacked.

His victims ranged in age from 18 to 35, and the majority were heterosexual. One was raped eight times in eight hours as he lay unconscious.

Police believe the postgraduate student may have abused at least 195 males after discovering videos he filmed of himself carrying out the assaults, and more potential victims have come forward since he was jailed last week.

He was caught in June 2017 when his final victim, an 18-year-old man, woke up during his ordeal and managed to take Sinaga’s mobile phone during the struggle.

Reynhard Sinaga: Most prolific rapist in UK history jailed Show all 11 1 /11 Reynhard Sinaga: Most prolific rapist in UK history jailed Reynhard Sinaga: Most prolific rapist in UK history jailed Reynhard Sinaga was jailed at Manchester Crown Court for life and must serve a minimum of 30 years after he was convicted of offences against 48 men Greater Manchester Police/PA Reynhard Sinaga: Most prolific rapist in UK history jailed The bedroom floor, where dozens of rapes took place, in the the home of Reynhard Sinaga Sinaga, who was convicted on 159 sexual offences including 136 counts of rape in Manchester between January 2015 and May 2017, drugged 48 men and filmed himself sexually violating them while they were unconscious in his city centre apartmen Greater Manchester Police/PA Reynhard Sinaga: Most prolific rapist in UK history jailed A general view of the night club Fifth in Manchester where Reynhard Sinaga watched and picked up men that he later raped Greater Manchester Police/PA Reynhard Sinaga: Most prolific rapist in UK history jailed CCTV grab of Reynhard Sinaga on Princess Street The Indonesian student posed as a good samaritan, offering the men a place to sleep or more drink, the court heard Greater Manchester Police/PA Reynhard Sinaga: Most prolific rapist in UK history jailed Reynhard Sinaga, middle, appearing in the dock at Manchester Crown Court on the day he was charged Julia Quenzler /SWNS.COM Reynhard Sinaga: Most prolific rapist in UK history jailed A general view of the apartment Montana House next to the night club The Factory Greater Manchester Police/PA Reynhard Sinaga: Most prolific rapist in UK history jailed The living room at the home of Reynhard Sinaga His victims – who were mostly heterosexual – had little or no memory of the assaults, which Sinaga filmed on his mobile phone. The men left the flat unaware they had been violated. Greater Manchester Police/PA Reynhard Sinaga: Most prolific rapist in UK history jailed The iPhone 4 taken by a victim and used to convict Reynhard Sinaga Sinaga was caught after one of the men regained consciousness and fought him off, before taking his phone to the police Greater Manchester Police/PA Reynhard Sinaga: Most prolific rapist in UK history jailed Bottles of alcohol which were used to spike victims in the home of Reynhard Sinaga Sinaga is thought to have laced alcoholic drinks with a drug such as GHB, known as liquid ecstasy, to incapacitate his victims Greater Manchester Police/PA Reynhard Sinaga: Most prolific rapist in UK history jailed Greater Manchester Police has urged anyone who believes Sinaga may have approached them on a night out to come forward. Officers say he may have been committing crimes for 10 years Greater Manchester Police/PA Reynhard Sinaga: Most prolific rapist in UK history jailed Mobile phones found in the home of Reynhard Sinaga When Greater Manchester Police examined the attacker’s multiple digital devices, they found 3.29 terabytes of graphic material – the equivalent of 250 DVDs – depicting sexual assaults. Jurors who had to watch some of the mobile phone footage were later offered counselling Greater Manchester Police/PA

Sinaga’s mother, Normawati Sinaga, has claimed she did not know her son was gay and believed his victim had made up the story.

Describing how she flew to the UK to visit him in hospital following his arrest, she told The Sunday Times: “Imagine a small Indonesian man being beaten up by a big, tall westerner. I wondered if the other person had made up the story.”

Ms Sinaga described her son as a “quiet boy” who went to church in Indonesia every Sunday, where he would play the piano.

She added: “We are a good Christian family who do not believe in homosexuality. He is my baby.”

The mother said she begged the perpetual student to return to his home country but he told her he wanted to follow his ambition of becoming a lecturer.

“He said Indonesia was not a good place to live for him and he felt comfortable living in Manchester,” she said.

Although Sinaga did not explain why, it may have been because of the way homosexuality is viewed in Indonesia, where the northern province of Aceh approved a law in 2014 that can punish anyone caught having gay sex with 100 lashes.

The serial rapist’s father told the BBC “his punishment fits his crimes” after he was jailed for life on Monday.

Because of the high number of offences, Sinaga’s crimes had to be divided into four separate trials.

The bedroom floor, where dozens of rapes took place, in Sinaga’s city centre apartment (Greater Manchester Police/PA)

He was publicly identified on Monday after the conclusion of his fourth trial saw reporting restrictions lifted.

Manchester Crown Court heard how Sinaga went out in the early hours of the morning, prowling the streets looking for drunk young men who were alone around nightclubs near his flat.

The slight-built Indonesian student posed as a good Samaritan, offering the men a place to sleep or more drink, the court heard.

He is thought to have laced alcoholic drinks with a drug such as GHB, known as liquid ecstasy, to incapacitate his victims.

In court, he claimed the men consented to playing a sex game in which they pretended to be dead.

But the defence was labelled “preposterous” by prosecutor Iain Simkin as footage, recorded by Sinaga on two iPhones, showed some victims snoring.

Ian Rushton, northwest deputy chief crown prosecutor, said Sinaga was “the most prolific rapist in British legal history” and possibly in the world, and would “no doubt still be adding to his staggering tally” had he not been caught.

Detectives say Sinaga may have committed crimes for 10 years and have urged anyone who believes they may have been approached by him on a night out to come forward.