The document outlines a murder mystery involving detective Sherlock Holmes, detailing crime terms and their definitions. It presents a specific case study of Alec Crabtree, who is found dead with clues suggesting his wife, Mrs. Crabtree, is the murderer motivated by jealousy upon discovering her husband's intention to leave her. The investigation reveals the murder weapon as a pair of missing scissors, along with key testimonies and evidence to support the solution.