BROKEN ARROW, Oklahoma - A Broken Arrow bicycle rider is dead after colliding with a parked utility truck Monday.

Broken Arrow Police say 70-year-old Ron Donaldson hit the legally parked truck in the 7700 block of East El Paso Street sometime Monday afternoon. 

Police say he was going about 20 mph when he hit the truck. They say he was wearing a helmet.

They said Donaldson was taken to the hospital with serious injuries.

The family told News On 6 it disputes the police department's version of what happened. They say there's no way he would have been riding that fast and was an experienced rider who would not have hit a parked vehicle.