A truck driver has been found guilty in a 2014 crash that claimed the life of a Barrie woman.

A judge found Geoff Quigley guilty of criminal negligence causing death on Thursday. Quigley was also found guilty of dangerous operation of a vehicle causing death, but that will be conditionally stayed.

Quigley was hauling 70,000 pounds of lumber when his truck rear ended a van in the northbound lanes of Highway 400, near Line 4 in Innisfil in 2014. The van went through the guardrail, hitting Karron Derbyshire-Mitchell’s minivan. She died later in hospital.

During the trail, the Crown argued the brakes on the truck were unsafe. Two OPP officers testified that Quigley's pre-shift notes did not outline any defects. However, seven of the air brakes were not properly adjusted.

Quigley told police that day he couldn't stop in time to avoid rear ending the van. The defence says the trucks GPS shows no excessive speed and no poor driving before the crash.

A sentencing hearing will be held at a future date.