Marion County, FL - Terrified cows ran for their lives as a Florida man led deputies through a cattle field in a high-speed chase Wednesday in Marion County.Gregory Walker, 50, stole a truck and refused to stop during the lengthy pursuit, the Marion County Sheriff's Office reported. A dash cam video shows the truck allegedly driven by Walker turning off a road and into open fields, where it careened across acres of grass, mowed through underbrush and skirted the trunks of oaks and palms.