A Knoxville man pleaded not guilty in Marion County District Court Friday to four counts of 3rd degree sexual abuse. 49-year-old Larry Darnell Muldrew was arrested last month. According to court documents, the charges stem from several incidents when Muldrew allegedly had sexual contact with a girl that was 12 or 13 at the time. The incidents allegedly occurred in 2009 and 2010. Muldrew will be back in court next month for a pre-trial conference.