Mr. and Mrs. Clyde went on a trip to the mountains. But 2 days later, Mr. Clyde returned home alone. He went to the police and said that Mrs. Clyde had fallen to her death.
The next day, Detective Stevens visited Mr. Clyde and arrested him for his wife’s murder. Clyde confessed his guilt and asked the detective how he’d found out he was the murderer. Stevens said he’d simply called a travel agent and asked for some information.
What did the travel agent say to the detective?
The travel agent told the detective that Mr. Clyde bought 2 plane tickets to the mountains but only one return ticket.