Previously, investigators had not released details about the alleged assailant.
They would only say that person fled the scene in a dark-colored, four-door vehicle.
In a press release, the Durham Regional Police Service elaborated on the Aug. 1 incident.
They said at 1:20 am.  on Monday, officers were dispatched to a call of shots fired in the rear of Dam Foods on Harwood Ave.  S. 154, just south of the 401 freeway.
At that point, police said they found five people who had been shot at the scene.
A sixth person, who had also been shot, turned up at a Toronto hospital, they said.
Police said four of the victims suffered non-life-threatening injuries, while the other two were seriously injured.  All the victims are now in stable condition, they said.
Investigators also said they believe the suspect attended the “customer appreciation party” held in the back of the local Caribbean market.
They said he “got involved in a verbal altercation with some patrons” and left the restaurant, but returned hours later and opened fire.
“(We have interviewed several patrons of this after-hours party and are continuing to seek witnesses and evidence to help identify the suspect(s)),” they said.
Anyone with more information about this incident should contact Det.  MacKinnon of DRPS’ West Criminal Investigations Bureau at 1-888-579-1520, ext.  2529 or Crime Stoppers at 1-800-222-8477 (TIPS) or www.durhamregionalcrimestoppers.ca.