Though:

According to the probable cause statements filed in support of the pair's arrests, shortly after 7 a.m. that day, a Utah Highway Patrol trooper clocked their northbound Toyota Corolla at 86 mph in an 80 mph zone near mile marker 63 at the northern edge of Cedar City.

The trooper wrote that he began to follow the car and watched it slow down to 70 mph in the left lane, with its driver not yielding to two other faster-moving vehicles that had to overtake it on the right.

So in other words, typical Utah driving! I'm shocked the officer had probable cause to pull them over! /s