A woman has filed a federal lawsuit claiming a central Mississippi mental health facility failed to protect her 11-year-old son from being sexually abused by a nurse while he was a patient. The lawsuit says Brentwood Behavioral Healthcare of Mississippi, located in Flowood, was negligent for not preventing the nurse, Clifford Hough, from abusing the boy “on a number of occasions” from December 2012 to January 2013. The suit was filed Friday in U.S. District Court in Jackson.