A 16-year-old girl driving a Mini Cooper on Interstate 15 a few minutes later saw Thompson drive his truck past her in the emergency lane. The Mini Cooper and the pickup both exited I-15 at Bangerter Highway and drove north on Pony Express Road, which is a dead end, police wrote. The girl stopped the Mini Cooper to let the pickup make a U-turn; instead, Thompson rammed the driver's side door, laughed and sped away. police wrote.
Moments later, an officer at 12300 S. Lone Peak Parkway and 12300 South saw Thompson speed through the intersection against a red light and crash into an SUV, killing the driver, 43-year-old Susan Madsen, and critically injuring her daughter, Tessa. The wreck caused a series of subsequent crashes, leaving seven other motorists with minor injuries.
Thompson was found, with bloodshot eyes and slurred speech, in the pickup truck, police wrote. He smelled of alcohol.
Investigators reconstructed the crash and found Thompson was driving about 60 mph in a 30 mph zone, police wrote. They found he was at least 175 feet from the intersection when he floored the gas despite facing a red light.
"If Thompson had chosen to apply the brakes at that time, instead of the gas pedal, he would have entered the intersection below 10 mph," police wrote.
Thompson was charged with first-degree felony murder; driving under the influence of alcohol and two counts of aggravated assault, third-degree felonies; seven misdemeanor DUI counts; and two counts each of assault and domestic violence in the presence of a child, all misdemeanors.