A central Iowa bicycle rider is dead after being struck by a hit-and-run vehicle. 37-year-old Suzette Carson of Colfax was killed while biking near her home just after one a-m Sunday. Police say she was hit in an unlighted area near the Skunk River bridge and investigators found no skid marks from the vehicle. A witness saw a dark-colored S-U-V speed away from the scene, but authorities have made no arrests. The state medical examiner says Carson died of multiple head and neck injuries. She was a single mother of two.