Man jailed for 22 years for teen murder

A man has been jailed for 22 years for murdering a teenager he believed had sexually assaulted his brother.

Jamie Leslie Sumner, 30, of Keilor East in Melbourne's north-west was found guilty of murdering Raymond George Allen, 16, whom he lured to a car park and tortured to death.

Allen disappeared from his Mooroopna home in northern Victoria on April 25, 2005.

His body has never been found.

The Victorian Supreme Court heard Sumner, who was using heroin daily, believed Allen had assaulted his teenage brother and wanted to exact revenge.

On Friday, Justice Geoffrey Nettle jailed Sumner for 22 years with a minimum term of 18 years.

"The nature and gravity of your offences are extreme," he said.

"Even if the allegation (against Allen) were true, it would in no way lessen the gravity of your offences."

Justice Nettle said the planned, premeditated and cold-blooded nature of the attack compounded the crime.

He said it was equally disturbing that Sumner had shown no remorse and failed to disclose where he had hidden Allen's body, depriving his family of proper mourning.

Justice Nettle said a lengthy sentence was necessary to help deter other members of the community from taking the law into their own hands.

Outside court, Allen's mother Katrina Rowlands said the term was not long enough.

"We have a life sentence. I hope he rots. And we want to know where my son's body is so we can lay him to rest," she told reporters.