fatal accident

Neither was wearing a helmet.

The other juvenile occupant of the vehicle was taken to a nearby hospital for treatment of non-life-threatening injuries.

The names of the drivers involved in the crash have so far not been released.

The crash happened just after 1 a.m. Sunday.

Their father, Phillip Ullom, was taken by ambulance to a hospital in Jackson.

Police are asking anyone who may have seen the crash to call them at (307) 637-6525.

Cheyenne police say the boy and his mother were struck by a vehicle at the intersection of E. Lincolnway and Converse Avenue around 5:45 p.m.

The driver may have fallen asleep.

The driver of the pickup was not wearing his seat belt.

Investigators say the ATV backed over the edge of a steep road.