Shawn Dee Casper

BOZEMAN – A Utah man faces a felony charge for a fifth offense of driving under the influence after allegedly running his semi off the road, crashing into a guardrail, and jackknifing along Gallatin Canyon Road.

According to court documents, 44-year-old Shawn Dee Casper was arrested Monday by a Montana Highway Patrol trooper responding to a report of a single-vehicle crash on US-191, near mile marker 71.

The trooper stated that the semi-truck, traveling northbound, was jackknifed on the side of the road with significant damage to its power unit when he arrived on scene.

Casper was reportedly uninjured and standing outside the truck. The trooper said in court documents that he asked Casper to sit in the front seat of his patrol car and found him to have a flush face, extremely bloodshot eyes, and smelled strongly of alcohol.

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Casper consented to provide a preliminary breath test, the trooper said, and returned a result of .222, more than three times the legal limit. He was also found to have four prior DUI convictions from 2002, 2003, 2007, and 2012.

Casper appeared in Gallatin County Justice Court on Wednesday. His bail was set at $10,000.