03/05/2015 11:05 EST | Updated 03/05/2015 11:59 EST

Candace Derksen Murder: New Trial for Mark Grant, Accused Of Killing Girl 30 Years Ago

OTTAWA - The Supreme Court of Canada has ruled not to reinstate the murder conviction for a man accused of killing a Winnipeg girl more than 30 years ago.

That means there will be a new trial for Mark Grant, who was found guilty of second-degree murder in 2011 in the abduction and murder of 13-year-old Candace Derksen in November 1984.

The conviction, which carried a life sentence with no chance of parole for 25 years, was overturned by the Manitoba Court of Appeal in 2013.Grant's lawyer had argued that the trial judge was wrong to deny him the right to present evidence that could show Derksen might have been killed by someone else.

A new trial was ordered but provincial prosecutors appealed to the high court after being granted leave to do so in 2014.

Derksen disappeared on her way home from school and her body was found six weeks later, bound and frozen, in a storage shed near her home.

Grant — who repeatedly denied killing Derksen — wasn't charged until 2007 after numerous tests on a piece of twine used to bind the teen.More coming