Salt Lake Police Sgt. Robin Heiden knew the city was having a problem with cars being stolen that were left warming up and unattended. But she had no idea how bad it was until Monday. "I seriously wouldn't have believed it if I hadn't gone out and seen it for myself," she said. Monday morning, Heiden and 49 other officers blanketed the city looking for vehicles that were left running and unattended. In 2 1/2 hours, from 6:30 a.m. until 9 a.m., they discovered more than 600 vehicles left running. "I think every single one of us was shocked.