Sinaga's sentence referred to Attorney General for being too "lenient"
Britain's most prolific rapist could get a longer sentence after his 30-year jail term was referred to the Attorney General as unduly lenient.
Reynhard Sinaga, 36, an Indonesian student, was jailed for life earlier this month with a minimum term of 30 years after drugging 48 men and filming himself sexually violating them in his Manchester city centre apartment.
The 36-year-old, a "perpetual student" studying for a PhD in Manchester picked up drunk and vulnerable men by posing as a "Good Samaritan" and offering help, Manchester Crown Court heard during his trial.
It is thought Sinaga would then lace his victims' drinks with a drug such as GHB, also known as liquid ecstasy
The Attorney General's Office on Wednesday confirmed it had received a referral letter under the Unduly Lenient Sentences scheme concerning Sinaga.
The Crown Prosecution Service confirmed its North West office had written to the Attorney General regarding the sentence in the case.
A CPS spokesperson said: “The case of Reynhard Sinaga is unprecedented in CPS history and we took a range of factors into account when bringing each trial to court.
“A key consideration was the likely impact on sentence of bringing further prosecutions and we are confident we did everything we could to ensure the court had adequate sentencing powers to see justice done in this case.”
Lawyers at the Attorney General's Office now have 28 days from the date of Sinaga's sentencing on January 6, to decide whether to challenge his sentence via the Court of Appeal.
Passing sentence Judge Suzanne Goddard QC said a whole-life order had never been made before in a case other than one involving murder.
However, she added: "In my judgment, you are a highly dangerous, cunning and deceitful individual who will never be safe to be released, but that is a matter for the Parole Board."
Police established during their investigations that 195 different males appear to have been unconscious while Sinaga assaulted them, but 70 of them remained un-identified.
Greater Manchester Police are asking anyone who has any information, or who believes they may be a potential victim of Sinaga to contact them on 101.
For anyone who wishes to seek support but does not want to talk to police, St Mary's Sexual Assault Referral Centre can be reached on 0161 276 6515 and Survivors Manchester can be contacted on 0161 236 2182.
The National Male Survivors Helpline can be contacted on 0808 800 5005.