Mourners gathered at the crash site that claimed the lives of six teens just south of Lloydminster early Saturday morning.
Three crosses bearing the names of the teens were placed at the scene. One read, "Taken too young. Never forgotten," The StarPhoenix reports.
"Why do you have to be gone?" screamed a young woman sitting on the ground in tears.
Cpl. Rob King said Monday that investigators are talking with witnesses and friends who saw the teens before they packed into a two-door car and headed out on a rural road early Saturday.
The car collided with a semi truck at an intersection south of Lloydminster, a city on the Alberta-Saskatchewan boundary. Both vehicles slammed into a nearby slough. The truck rolled onto its roof and the car sank to the bottom.
The victims — three girls and three boys — were between 13 and 17.
Investigators have briefly talked with the truck driver, the only one who survived the crash, said King.
In the end, said King, the evidence may not yield all the answers.
"We want to try to get as 100 per cent positive as possible but we might never get there."
"My heart's so broken right now," said Dalbert Attfield Tarren's dad on Sunday, wiping away tears.
The oilfield worker said his 68-year-old mother also died two weeks ago. Paying for two funerals so soon means he'll have to take out another bank loan, he said.
"I don't know how I'm going to do all this."
The victims have been identified as Tarren Attfield, 15, of Lashburn, Sask; Jayden Boettcher, 16, and Kristopher Tavener, 17, both of Marshall, Sask; and Naomi Salas-Schafer, 13, Aimie Candace Elizabeth Hurley, 14, and Mackenzie Moen, 14, of Lloydminster.
With files from The Canadian Press