An eight-woman, four-man Hanover County jury found Derek E. Burkhead, 26, guilty of involuntary manslaughter tonight in the shooting death of his girlfriend. The panel recommended that he serve 10 years in prison.  Hanover Circuit Judge J. Overton Harris will set a formal sentencing date later.  This week’s trial was the fourth for Burkhead in the case. Two previous mistrials in the case ...