Sweet Smell of Death

Millionaire Sanford Embury is found dead in bed, alone, with the door of his second story bedroom bolted shut from the inside. He was known to be a controlling husband, refusing to give his pretty young wife an allowance of cash or her own checking account. "Eunice Embury was neither mean nor spiteful of disposition. She had a furious temper, but she tried hard to control it, and when it did break loose, the spasm was but of short duration and she was sorry for it afterward. Her husband declared he had tamed her, and that since her marriage, about two years ago, his wise, calm influence had curbed her tendency to fly into a rage and had made her far more equable and placid of disposition." Was his wife a party to the murder, or perhaps did she commit the murder in a fit of rage? Who else had a motive? And how does a clue of raspberry jam point to the killer?