The Wyoming Highway Patrol says a possible medical condition may be to blame for a deadly, three-vehicle crash west of Casper Sunday morning.

The crash happened around 8:40 a.m. near milepost 25 on U.S. 20-26.

The patrol says a van was headed east when it went into the westbound lane and side-swiped an oncoming pickup before colliding head-on with a vehicle behind the pickup.

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One of the drivers, 51-year-old Wyoming resident David Cieslar, was buckled up but died from his injuries.

The other two drivers as well as two passengers were also reportedly injured in the crash, but the patrol didn't say to what extent.

The patrol says it was clear and the highway was dry at the time of the crash.

LOOK: See how much gasoline cost the year you started driving

To find out more about how has the price of gas changed throughout the years, Stacker ran the numbers on the cost of a gallon of gasoline for each of the last 84 years. Using data from the Bureau of Labor Statistics (released in April 2020), we analyzed the average price for a gallon of unleaded regular gasoline from 1976 to 2020 along with the Consumer Price Index (CPI) for unleaded regular gasoline from 1937 to 1976, including the absolute and inflation-adjusted prices for each year.

Read on to explore the cost of gas over time and rediscover just how much a gallon was when you first started driving.