They say 35-year-old Amir Hossein Homayouni, who also went by Danny, was found outside of a home on Leisure Lane near Bathurst Street and Major Mackenzie Drive West on Friday, Nov. 13 at about 6:20 p.m.
Homayouni, who is from Richmond Hill, was suffering from gunshot wounds. He was taken to hospital but later died.
Police have released images of a suspect vehicle that was seen in the area in hopes that someone will recognize it, noting that the license plates on the vehicle were stolen.
The car is described as a four-door black Acura from between 2004 and 2008.
Anyone with information or camera footage from the area that night is asked to get in touch with York Regional Police.