Fullerton was shot just after 4 p.m. Tuesday following an argument outside an apartment building on Denarda Street, near the corner of Weston Road and Eglinton Avenue West.
He leaves behind two children.
According to his father, Leaford Fullerton, he wanted to be an actor and had spent the last year of his life being a mentor at the youth centre.
Witnesses said Fullerton was involved in an argument with an unknown suspect, according to police.
It is not yet known what the argument was about.
Police said that Fullerton walked away from the man and that the man then pulled out a gun and started to shoot, hitting Fullerton several times.
“This was a public execution of a defenceless and unarmed man,” police said Friday.
Police also said that one of the stray bullets went through a nearby apartment north of the scene and ended up in the kitchen.
No one was injured as a result of that bullet.
Shortly after the shooting, a telephone tip said the suspect had got into a silver Acura.
A small, silver car was last seen traveling southbound on Weston Road from the scene while the police were responding to the sound of gunshots.
The suspect in question is described as black with a light complexion, six feet tall with a thin build and wearing dark clothing.
At the time of the shooting Fullerton was in possession of marijuana, crack cocaine and a large sum of money, according to police who add that his affiliation with gang members in the area could likely have put him at risk.
He once faced charges stemming from a police gun-and-gang investigation, though the charges were later dropped.
On Thursday night Fullerton was remembered at a memorial for being an asset to his community and always encouraging youth to strive for more.
“It was an experience to remember,” Lekan Olawoye told CBC’s Metro Morning Friday.
“We had almost 200 young people in the space shoulder to shoulder and young people spoke passionately about the man, the father of two, the mentor, the supporter, the brother and the uncle.”
Olawoye is the executive director of For Youth Initiative, an organization that tries to create opportunities for youth at risk. He hired Fullerton to be a basketball coach for the group.
Olawoye said Fullerton was a natural leader and a magnet for young people with an amazing ability to make people laugh, think and smile.
”We believe that you push young people to be better, you tell them that they could be more,” Olawoye said.
“That’s the importance and that’s the role that Leonard played through the community. He said, ‘You know what, I made mistakes early on, but you can be more, you can do more.’ And that’s the type of assets we need in the community.”
Olawoye said Fullerton acknowledged his past mistakes and said they would help him learn and become a better person
Police are asking anyone with information on the shooting to contact them at 416 808 1204 or contact Crime Stoppers at 1-800-222-TIPS