A 28 year old Ogden man accused of strangling his wife to death last month pleaded not guilty to a charge of first degree murder on Monday. Joshua Powell allegedly killed his wife and mother of two, 25 year old Jaclyn Powell. Authorities found her dead in their home on October 21 after Joshua Powell called police. He initially told police he had struck her the night before,killing her,but the Iowa State Medical Examiner's Office determined Jaclyn Powell died of asphyxiation and classified her death as a homicide. A trial date of February 19,2013 was set for Joshua Powell.