The man sentenced to life in prison for the first-degree murder of 14-year-old Stefanie Rengel has had his appeal denied.

David Bagshaw appeared before the Ontario Court of Appeal in Toronto Wednesday, to appeal the adult sentence he was handed for the crime.

Bagshaw was just four days shy of his 18th birthday when he lured Rengel from her Toronto home and stabbed her six times with a kitchen knife on New Year's Day 2008.

Rengel died in a snowbank just steps from her house.

Bagshaw was handed the maximum sentence for a youth offender being sentenced as an adult -- life with no chance of parole for 10 years.

His lawyers argued Bagshaw should only serve the maximum applicable youth sentence of 10 years plus time served in pretrial custody.

If Bagshaw had murdered Rengel just four days later, he would have been subject to an automatic life sentence with no chance of parole for 25 years.

Bagshaw's girlfriend at the time of the murder, then-15-year-old Melissa Todorovic, is serving a sentence of life with no chance of parole for seven years. That was the maximum adult sentence possible for someone her age.