A High Court judge told a serial sexual offender he wished he could lock him up indefinitely, during sentencing this morning.
Auckland man Sumit Narayan was found guilty at trial last year of using a stun gun to abduct a prostitute and violate her in a car park.
The offending took place in 1997 and charges were only laid after advances in DNA testing linked him to the crime.
Narayan has been in prison for the last 15 years for similar sexual offending from 1999 and this morning in the High Court at Auckland Justice Timothy Brewer added seven years to his sentence.
The judge said who would have preferred to sentence the "dangerous man" to preventive detention - an indeterminate life sentence - but it was not an option because the offender was too young at the time of offending.
Last year, a jury found the 35-year-old guilty of four counts of sexual violation, one of attempted sexual violation, one of indecent assault and two aggravated robbery charges.
Narayan - 19 at the time - pulled up alongside a prostitute who was entertaining a client in her car.
He shot the man with a stun gun and ordered him to take his pants off and lie face down on the ground.
After threatening the young prostitute with the weapon, he forced her to do the same as he stole her bag and the man's wallet.
Once the man had been allowed to leave, Narayan ordered the woman into his car and put a pair of shorts over her head while he drove her to a secluded spot 10 minutes away.
"Needless to say, she was terrified," Justice Brewer said.
Again, Narayan made her lie naked on the ground and then violated her.
Before allowing her to leave, he said if she told anyone about the incident he would shoot her and he knew where she lived.
Justice Brewer said a probation report on the offender was damning.
"What's particularly worrying is that you're assessed to be a high risk of further violent sexual offending. You lack insight, lack concern for your victims and you're impulsive. You have an interest in deviant sexual practices and have possible personality disorder," he said.
"Having seen you give evidence at trial, I fully understand the comments made in the pre-sentence report. I judge you to be a dangerous man. If I could, I'd sentence you to preventive detention, but I can't. You were too young at the time of offending."
Narayan will serve a minimum of four more years in prison before being eligible for parole.
He was reclassified as a high-security prisoner after Corrections staff found porn on a USB stick hidden inside his cell in February last year.