JACKSON, Miss. -

Trial has been delayed until August for a man who was declared dead in Mississippi in 1994 and surfaced years later as a suspect in the deaths of his Las Vegas girlfriend and her daughter. That will be almost three years from when the mother and daughter went missing in September 2010. The trial had previously been scheduled for January. Thomas Steven Sanders is charged in U.S. District Court in Alexandria, La., with kidnapping resulting in the death of 12-year-old Lexis Roberts. He's also charged with using a gun during a crime that resulted in death.  Roberts' body was found in October 2010 in Catahoula Parish, La. Her mother's body was found the next month in Yavapai County, Ariz. Federal prosecutors have said they will seek the death penalty.