A Casper man died as the result of a one-vehicle rollover crash north of Wheatland on Tuesday, according to a news release from the Wyoming Highway Patrol.

Brad W. Cool, 62, was driving a passenger car southbound on Interstate 25 when the accident happened 5.5 miles north of Wheatland, according to the news release from Sgt. David Wagener.

At 6:25 a.m., it left the highway to the west, re-entered the road, crossed both lanes of travel, entered the median, and tripped and rolled one-and-a-half times. Cool was not wearing his seat belt, was ejected from the car and died at the scene.

The Wyoming Highway Patrol is investigating speed, distracted driving and/or fatigued driving and drug use as contributing factors in this crash.

This marked the 63rd highway fatality in Wyoming for 2015, compared to 67 fatalities at this time last year.