Motive for Murder

Inspector Mallison was reluctant to arrest the murdered man's son, although the incriminating evidence was overwhelming: he'd been alone with his father immediately prior to the murder and there'd been a bitter quarrel; Goldstein was killed trying to alter his will - unfavourably for his son; the weapon, a desk paperweight bore the son's fingerprints, and his father had withdrawn financial support for a new West End play in which his son was to star. Yet still Mallison wasn't convinced...