Ex-nurse charged in 4 hospital deaths Montague DA calls killings 'serial murder'; other cases possible 07/18/2002 By BERNADETTE PRUITT / Special Contributor to The Dallas Morning News MONTAGUE, Texas - Oma Wyler, 95, was in good spirits on that Sunday in January. After two weeks in Nocona General Hospital, she would soon be released. "Take me home with you, would you?" she prodded when daughter-in-law Billie Wyler came for a visit. The younger Mrs. Wyler assured her that she soon would. Two hours later, Oma Wyler, who had been feeling well, was "out of it," her daughter-in-law said. Later...