OMAHA, Neb. -- An Omaha man serving a long sentence for sexually assaulting a six-year-old boy has been charged with multiple counts of possessing child pornography. 

42-year-old Christopher Payne, has been in State Prison since 2006, serving a 40-year sentence. 

Court documents state that corrections officials searched Payne's jail cell in Tecumseh before his transfer to the Omaha Correctional Center. 

The Nebraska State Patrol alleges the inmate had hidden a number of photos in between other paperwork. The images showed nude boys between 8- and 12-years old. 

Court documents said Payne told authorities the pictures came from a book.