A Mother Accused Of Seriously Injuring Her Infant Has Admitted To The Crime In Carter County Criminal Court. 30 Year Old Christina Niles Of Johnson City Plead Guilty To Five Counts Of Aggravated Child Abuse. The Eight Month Old Child Suffered A Fractured Skull, A Broken Arm And Burns. Niles Has Been Ordered To Serve 20 Years In Prison With No Possibility Of Parole.