Jeremy Cook's funeral will be held at St. Anne's Roman Catholic Church, starting at 10 a.m. ET.
Cook died last weekend after he used an app to track the cellphone he left in a taxi to an address in the north end of London, police say.
When Cook and a relative went to the address, he was confronted by three men in a car.
Police said Cook tried to retrieve his phone, but the vehicle began to drive away, prompting him to grab on to the driver's side door. That's when the fatal gunshots were fired, police said.
London police says Muhab Sultanaly Sultan, 23, of Calgary is wanted for second-degree murder and remains at large.
Police are also looking for a second suspect, described as:- A black male.
- Having very short hair.
- Last seen wearing a black jacket or shirt, and a fitted cap.
A third man, who exited the vehicle just before the shooting, is being asked to contact police and identify himself.