Police announced a $50,000 reward for any evidence that leads to an arrest in the 2012 murder of Leonard Fullerton.

The 26-year-old was a victim in a targeted shooting outside a pizza shop near the corner of Weston Road and Eglinton Avenue West on Oct. 30, 2012. Police believe the unarmed Fullerton was involved in an argument and was shot from behind. He was a father of two.

"It's very painful for me to (have) lost my only son," said his father Leaford Fullerton at a press conference Thursday morning.

Leaford said the murder has been most difficult on his two grandchildren.

"When you ask him when ask him where daddy is he says daddy's in heaven but the girl is traumatized by his father's death," he said.

Det. Leslie Dunkley said Fullerton — also known as "Chris" or "Curlz" — was killed in "a public execution" and was "gunned down on the street corner in the presence of innocent civilians" and near a daycare centre.

Dunkley says he believes there are a number of witnesses with "crucial information" about the case who also know who the shooter is but have not come forward.

Police have released surveillance video of a small, four-door silver car, possibly a Honda or Nissan, that was captured near the scene.

Police say the video shows the suspect vehicle backing into a laneway and then parking before a man exits the vehicle seconds before the shooting.

The suspect is described as a black male with light complexion and about six feet tall. He has a thin build and was wearing a dark, hooded wool jacket with white accents.

Fullerton's family joined police at a news conference announcing the reward on Thursday, including his father Leaford Fullerton, who described his pain at losing his only son.

With files from Canadian Press