The security agency knew it had a mole.
It had to be one of their top three operatives. The director had a solution. It was a full proof way of weeding out the agent that had been leaking agency information. The assistant director wasn’t happy with the plan, but the director went ahead and called the two men and one woman to his office. He handed them each an envelope.
Each one contained the name of one of the others. They were told to go down into the basement and wait. They were there for a few minutes before the lights went out. Gunshots could be heard, then silence.
Shortly afterwards, an unhappy assistant director entered the director’s office, saying, “They’re all dead!”
“I know,” said the director, “but it had to be one of them.”