A man charged with killing a 6-year-old girl whose half nude, lifeless body was found hanging from the rafters of her family's garage pleaded guilty to capital murder Friday and was sentenced to life in prison without the possibility of parole. Shaun Earl Arender, 21, pleaded guilty and then testified about the murder of Hanna Mack as part of a plea deal. Hanna's mother, Dana Mack, found the body of her youngest daughter when the first-grader would have been getting ready for school in September 2007. A DNA sample taken from Hanna's shirt indicated Arender was a possible match, according to an arrest affidavit. The affidavit said "the defendant was then and there in the course of committing or attempting to commit the offense of aggravated sexual assault against Hanna Mack." Navarro County authorities later confirmed she was sexually assaulted.