It's been two years since Zach and Connor Kvalvog set out to a basketball tournament in Wisconsin. It's also been that long since the Moorhead teenagers were killed in a mysterious crash.
The boys' father, Ray, went on WDAY radio Friday to remind people they're still looking for answers.
"I remember dropping them off at the school parking lot. Less than an hour later, they're dead," Kvalvog said on the radio. "It doesn't get better."
All we really know about the crash is what the Minnesota State Patrol has reported: that a semi was traveling very close to the boys' pickup truck on Interstate 94 near Dalton. It's believed that the semi swerved into the boys' lane, then they swerved, overcorrected and crashed.
Zach and Connor, 18 and 14, died in the crash. Two others had also been in the vehicle. They survived.
One of the other passengers spoke out about what happened and he pretty much said the same thing, explaining they had been trying to pass the semi.
However, the truck driver didn't stop after the crash. So the boys' father is on a mission to find the driver and get some answers.
In the interview, Ray explained he's not looking to prosecute. He and his wife just want answers.
The reward has been upped from $50,000 to $100,000. Anyone with information can contact the Kvalogs at 701-793-0187. Here are some photos of the semi.