A judge has declared Stanley Tippett — who was convicted of kidnapping and sexually assaulting a 12-year-old girl in Peterborough, Ont., — a dangerous offender.

Tippett, a father of five, was convicted in December 2009 of assaulting an Oshawa girl in Peterborough in August 2008.

Tippett was found guilty of all seven counts he was facing, including kidnapping, sexual assault and sexual interference.

In issuing his ruling Monday in a Peterborough courtroom, Justice Bruce Glass said Tippett has a history of unrestrained behaviour, can't control sexual impulses and is likely to hurt someone else in the future.

"Society can only be protected and not at risk if Tippet is given an indeterminate sentence," Glass told the court. "Today is a tragic day for everyone involved. For the victim of the offences, and also a sad day for Mr. Tippett."

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Stanley Tippett was convicted in 2009 of sexually assaulting a 12-year-old girl in Peterborough, Ont.

Glass said the ruling means that if Tippett is ever released from jail, he will be forever prohibited from being anywhere children are likely to be present, such as schools, playgrounds and swimming pools.

The girl was abducted after leaving a birthday party in Peterborough. She was found several hours later, half-naked, behind a high school 75 kilometres away.

In evidence presented at the trial, the court was told the victim had left the party with two other girls and was last seen getting into a van. When she failed to turn up at her grandmother's home as planned, police were called.

The girl, who cannot be identified because of her age, was found in a wooded area behind Courtice Secondary School and taken to hospital for treatment. 

The "dangerous offender" designation is reserved for Canada's most violent criminals and sexual predators.

Crown attorneys can seek the designation during sentencing and must show that there is a high risk that the criminal will commit violent or sexual offences in the future.

The designation carries an automatic sentence of imprisonment for an indeterminate period, with no chance of parole for seven years.

Changes to the Criminal Code of Canada in 2008 require some repeat offenders convicted three or more times of violent crimes or sex crimes to prove that they are not a danger to society.