Police say Fawell, 24, suffered numerous stab wounds from two different weapons, suggesting at least two assailants were involved in the killing.
His body was found behind the arena at Jimmie Simpson Park, near Queen Street East and Booth Avenue.
Police say a post-mortem examination revealed the cause of death was numerous stab and chopping wounds to the neck, face, back and head.
"This is one of worst sharp-force trauma homicides that I’ve seen," said Toronto Police Det. Sgt. Gary Giroux on Wednesday. "It would have been a sustained attack that took some time."
Deanna Parlee, who is Fawell’s aunt, said Wednesday her nephew had personal challenges but was working to turn his life around.
"George was a human being," she said while fighting back tears. "No one deserves to be dumped like garbage."
Parlee said she became George’s legal guardian when he was a child and said he referred to her as "mother."
'I know someone saw something'
She said George was the oldest of five siblings and lived in an apartment with his girlfriend.
"He was someone who lived with challenges and who was overcoming them," she said. "As a son, he brought a lot of joy and he was very helpful to everyone. We all miss him and want his killer or killers brought to justice. I know someone saw something."
She said she last saw George on Thursday. "He asked if I needed anything from the store."
Police say they have gathered a number of leads but are also asking people in the area to come forward with information.
Giroux said police believe Fawell was killed near the place where his body was found.
He also said he's confident the killers are from the area.
"The answer is there and I'm sure that somebody down there knows what happened to him," he said.
Anyone with information is asked to contact Giroux at 416-808-7387 or Crime Stoppers anonymously at 416-222-TIPS (8477).