SIOUX CITY, Iowa (AP) – A Sioux City prep football star who has committed to playing football next year for the University of Iowa faces a drug infraction and three misdemeanors in Nebraska.  The Sioux City Journal reports that 18-year-old Michael Malloy has pleaded not guilty to the charges: obstructing a peace officer, trespassing, possession of drug paraphernalia and driving without headlights.  Court records say Malloy was arrested on a Nebraska warrant issued after an incident early on July 31 in South Sioux City, Neb.  A police officer says in an affidavit that Malloy ran from a vehicle that the officer had pulled over.  Malloy is a running back beginning his senior season at Bishop Heelan High School.