A 20-year-old Calgary man has been arrested and charged in the shooting deaths of two men in a Superstore parking lot over the May long weekend.

Around 8 p.m. on Sunday, May 21, police responded to the parking lot located at 130th Avenue and 48th Street S.E. for reports of gunshots.

Two men — Anees Amr, 26, and Colin Reitberger, 23 — were pronounced dead at the scene.

On Thursday, police arrested Christian Joffre Ouellette. He has been charged with two counts of first-degree murder.

Calgary police Insp. Don Coleman said they believe the men were known to each other and the incident was drug related.

"I think the relationship of the accused to the victims would be in a criminal network association-type manner," Coleman said.

Hunting for third vehicle

After an investigation that included interviews with around a dozen witnesses, police say they believe the two victims arrived at the parking lot together.

Coleman said police believe Ouellette drove to the Superstore alone, committed the homicides and left. The vehicle was recovered shortly after the shootings in the northeast part of the city, east of the airport.

On May 21, Anees Amr, 26, and Colin Reitberger, 23, were shot to death in this Superstore parking lot. (Mike Symington/CBC)

Police are looking for the driver of an older model red Dodge Durango SLT that dropped Ouellette off at a gas station on Freeport Blvd. N.E. after the murders.

"We anticipate that the person who was in that vehicle, driving, that picked up — maybe he knew Mr. Ouellette, maybe he didn't, maybe he just picked him up. We don't know what the circumstances are," Coleman said.

Police are also asking for the public's help to locate William Kincade-Miller, who they say may have more information about the incident. Kincade-Miller is believed to be making his way across the country to New Brunswick.

Kincade-Miller is wanted by police for breaching parole conditions and possible weapons offences, unrelated to this crime.

Police are asking for the public's help to locate this vehicle — a 2004 to 2006 red Dodge Durango SLT with a sunroof. Police believe the man driving the vehicle on May 21 has information relating to the double homicide. (Calgary Police Service)

Coleman said Ouellette is known to police, but wouldn't comment on Ouellette's history. However, CBC News has confirmed Ouellette and his father, who shares the same name, were both charged in June 2016 with possession of cocaine for the purpose of trafficking.

Ouellette was also charged at the time with firing a gun, two counts of possession of a weapon and benefiting from crime. Those matters are still before the courts.

His father, a Calgary defence lawyer, was disbarred in July 2016. Charges against him were stayed in November.

Ouellette is due in court for the homicide charges on June 12.

Anyone with information is asked to contact police or Crime Stoppers.