Pine Bluff police say they`re questioning a man who surrendered after hearing he was being sought in connection with the death of a former Mississippi resident. The victim was was beaten and apparently run over. Twenty-three-year-old Bernard Marks of Pine Bluff was arrested yesterday and questioned. Forty-nine-year-old Michael A- Walker. who moved to Pine Bluff about three years ago from Vicksburg, Mississippi, died early yesterday at University Hospital in Little Rock.