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A driver killed in a Saturday evening rollover crash in Sublette County may have fallen asleep at the wheel, the Wyoming Highway Patrol says.

A Wyoming driver killed in a Sunday morning crash west of Encampment may have fallen asleep at the wheel, the highway patrol says.

A Colorado teenager was killed Sunday afternoon after the pickup she was riding in crashed on Interstate 80 in Wyoming, the highway patrol says.

A Wyoming man who died in a rollover crash Tuesday evening south of Kemmerer may have fallen asleep at the wheel, the highway patrol says.

A 20-year-old driver was killed and their two passengers injured in a single-vehicle rollover crash in southwest Wyoming early Easter morning, the highway patrol says.

A 52-year-old Wyoming man is dead after crashing his pickup into a sign in Lander, the Wyoming Highway Patrol says.

The Wyoming Highway Patrol says driver fatigue may be to blame for a single-vehicle rollover crash that claimed the life of a young Wyoming man.

A Wyoming driver was killed and her passenger injured in a single-vehicle rollover northeast of Edgerton early Wednesday afternoon, according to the Wyoming Highway Patrol.

A driver who died in a single-vehicle rollover crash east of Rock Springs Tuesday morning may have fallen asleep at the wheel, the Wyoming Highway Patrol says.

An 18-year-old driver killed in a single-vehicle rollover in Goshen County may have fallen asleep, the Wyoming Highway Patrol says.