MINNEAPOLIS (WCCO) — The family of two brothers who died in a crash near Fergus Falls is now offering a reward for information in the case.

Eighteen-year-old Zachary Kvalvog and his 14-year-old brother, Connor, were killed when their pick-up rolled on the way to a basketball tournament on June 23, 2015. Two other boys were badly hurt.

Now, billboards are going up along Interstate 94 offering a $10,000 reward for the semi-truck believed to be involved in the accident.

The boy’s parents say they just want to know the truth about what happened.

The Minnesota State Patrol is still investigating this case.