Texas County, OK — February 14, 2025, Treyton Mussman was killed and Cory Hammonds was injured in a truck accident about 7:40 a.m. on County Road Y.

Authorities said a 2013 Peterbilt semi-truck was headed east when it collided with a northbound 2014 Ram 1500 at the intersection with County Road 30.

Treyton Mussman Killed, Cory Hammonds Injured in Truck Accident near Guymon, OK

Pickup driver Treyton K. Mussman, 27, was pronounced dead at the scene of the crash south of Guymon, according to authorities.

Truck driver Cory D. Hammonds, 59, was flown to a trauma center in Texas with internal injuries, authorities said.

Authorities have not released any additional information about the Texas County crash at this time. The accident is still under investigation.

Commentary by Attorney Michael Grossman

Crashes at rural intersections often raise critical questions about visibility, right-of-way and driver decision-making. In this case, the key issue is how the semi-truck and the pickup ended up colliding at a crossroads where one of them should have yielded.

The first thing investigators need to determine is whether either driver failed to stop or misjudged the other’s speed. Was there a stop sign or other traffic control device at this intersection? If so, was it clearly visible, or was it obstructed by overgrown vegetation, poor lighting or even missing altogether? I’ve handled cases where simple infrastructure failures played a major role in causing a crash.

Beyond that, speed and reaction time are crucial factors. Was the semi-truck traveling too fast to stop in time? Was the pickup driver trying to beat the truck through the intersection? Black box data from the truck, along with skid marks and crash reconstruction analysis, could help answer these questions.

One other issue investigators should consider is whether this intersection has a history of crashes. Some rural intersections are inherently dangerous due to poor design, lack of signage or limited visibility. If this location has seen similar wrecks before, that’s something worth looking into.

At this stage, there are still many unknowns, and it’s easy to make assumptions. But real accountability requires a thorough investigation: one that looks beyond the immediate crash scene to determine whether this was truly a matter of driver error or if other preventable factors played a role.

Explore cases we take