LAS VEGAS -- Nevada Highway Patrol isn’t expected to be everywhere at once, but a spokesperson told FOX5 that on some nights, a lack of manpower is to blame for slow response and in one case, none at all.

A Las Vegas couple followed an elderly woman driving 25 mph on the 215 Beltway, recording the incident on a cell phone for 12 miles as traffic whizzed by at normal speeds.

Raw Video: Slow Driver On Vegas Beltway

“That night we only had eight troopers on to cover the whole valley,” Trooper Joseph Fackrell told FOX5.

The couple recording the slow driver stayed behind her with their hazard lights on in an attempt to prevent an accident. They called 911 to report the woman, but a trooper did not respond.

“I just don’t understand how nobody can respond to this, when seriously somebody’s going to die,” said the driver, Paul Coleman. “To me, NHP was kind of like ‘let’s wait for an accident to happen.’”

Video: NHP Admits Troopers Can't Always Answer Calls

Fackrell explained that troopers take calls by priority, saying, “If one’s on a traffic stop with nothing really going on, they are going to clear and go to a more severe call.”

The one incident, Fackrell said, should not discourage people from calling authorities.

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