Sarah Nicole Rae was found fatally stabbed in a northeast Calgary home in August 2008. ((Calgary Police Service))

A Calgary man has been found guilty of second-degree murder in the stabbing death of his girlfriend.

Travis Martel, 36, killed Sarah Nicole Rae, 24, on Aug. 3, 2008, and recorded her last moments on his cellphone.

"He was conscious and committed to a culpable act. It was not an accident," Justice Peter McIntyre told a Calgary courtroom on Friday. "I do not believe any of his original statements about the knife or how it was used … He intended to kill Rae."

Martel originally told police he had gone for a walk on the night of Rae's death and returned home to find her dead in his bed. He later insisted that the stabbing was an accident, triggered when she attacked him with a knife.

He called 911 at 4:59 a.m., saying his "wife" was dead in the bedroom with a large stab wound in her chest.

A deleted video file discovered on Martel's cellphone showed her lying on a bed as he slowly focused on the spreading red stab wound on her chest.

With heavy-metal music blaring in the background, a voice can be heard muttering from behind the camera of the Sony Ericsson flip phone.

"Good that I said I love you …This sucks. I'll be there soon with you, baby girl."

The court heard that Martel called Rae his "fiancée," but when a friend asked Rae about it the night before her death, she said she had four other boyfriends and was planning to dump Martel.

with files from The Canadian Press