Thorne-Belance was just five years old when the car he was riding in was hit by an unmarked police car on Feb. 13, 2014.
The car was travelling at 122 kilometres an hour when it slammed into the side of father Mike Belance's sedan.
He was turning left on a green light at the corner of Gaétan-Boucher and Davis boulevards in Longueuil, Que.
The boy fell into a coma and died five days later in hospital. The SQ officer behind the wheel of the unmarked car was not charged for killing him.
It was later revealed that the SQ officer was involved in a tailing operation relating to an anti-corruption investigation.
In November, CBC News reported that the crash will be reinvestigated by a panel of independent prosecutors.
Evening candlight vigil planned
Family, friends and neighbours gathered at the corner where Thorne-Belance was hit on Friday to remember the young boy on the anniversary of his death.
The day began at 8 a.m. with the reading of a message in his memory. It will wrap up with a candlelight vigil at 6:15 p.m.