In a decision that was later overturned, Katherine Quinn was convicted in 2007 of the second-degree murder of Matthew Martins and received an automatic life sentence. (CBC)A woman whose conviction in the 2005 death of a teenager at a Surrey, B.C., SkyTrain station was recently overturned will be released on bail while she awaits her new trial.

On Wednesday, the B.C. Court of Appeal approved the release of Katherine Quinn, now 27, originally found guilty of second-degree murder in the July 2005 killing of Matthew Martins, 16.

'Not only has the criminal justice system failed my beautiful child, they have failed all of you, all Canadian citizens.' —Sandra Martins-Toner

The court struck down Quinn's conviction in June, saying the trial judge erred in his instructions to the jury, and a new trial was ordered.

Martins's mother, Sandra Martins-Toner, said she was devastated Quinn was granted bail.

"Not only has the criminal justice system failed my beautiful child; they have failed all of you, all Canadian citizens. There is nothing there to protect you," she said.

"Don't ever have any sort of faith or hope that the justice system is there to defend your child who you've lost to a vicious and callous crime. My child died in a way no wild animal should ever die. His death was long and prolonged and extremely painful."

Quinn and her boyfriend, Robert Forslund, now 30, were both found guilty of second-degree murder in 2007.

Sandra Martins-Toner says the justice system has failed her slain son. (CBC)During the trial, the prosecution alleged Quinn jumped Martins and tried to steal his necklace. While she didn't take part in the actual beating of the victim, the trial heard that she gave Forslund the command to kill by saying, "If you love me, you'll kill him."

Both received automatic life sentences, with eligibility of parole in 10 years for Quinn and in 17 years for Forslund, who did not appeal his conviction.

A number of conditions have been placed on Quinn's release. The mother of three will have to live with her parents, and she won't be allowed to leave the house except for medical and court visits.

Quinn is scheduled to appear in B.C. Supreme Court in New Westminster on July 30 to determine the date of her new trial.