3. Inspector Clouseau was ready to solve the murder. "I find many clues here," he said, "but only one clue gives me the answer. The killer used a small knife to kill Mrs. Jones. The window was open for the killer to escape. The killer did not take the money from Mrs. Jones' purse. But the most important clue is this piece of blond hair in Mrs. Jones' hand. person in this house with blond hair is Olga the maid. She is the killer!