THE SUSPECT Luther Grandison was a name that meant many different things to many different people. To movie- and theater-goers, it signified the Mr. Grandison, director of award-winning spine chillers. To Mathilda Franzier, it meant "Grandy," the man who had sheltered her since childhood and personally saw to it that nobody would rob her of her fortune. To Althea Conover, it meant rescue from the fate of all penniless waifs - the orphanage. But to Francis Howard, the name had the strongest meaning of all...murder!