David was bankrupt(破产). He was trying to figure out how to make some money. "Maybe my insurance policy(保险单) can save me," he thought. So he made a plan.
On a Saturday evening, as it got dark outside, he put on a pair of dirty boots and walked through his house. He left many dirty footprints. He went back the way he came while wearing socks. He cut the boots into pieces and flushed (冲走) them down the toilet.
At 11 p.m., he took a pistol (手枪) from his bedside table and went down his hallway without shoes. He fired three shots down the hallway. Then he walked to the other end of the hallway and fired two shots in the opposite direction.
His neighbors soon called the police. Three police officers came to David's house just minutes later.
"I can't really tell you much. I was woken by a noise on the ground floor of my home. I took my pistol and went downstairs. Halfway down the stairs, I saw a shadow of a man. I shouted 'Stop or I'll shoot.'"
"He shot at me three times and I shot back twice. The shadow disappeared into the kitchen. More than 15,000 pounds in cash have been stolen from my safe(保险柜)," David said.
After collecting the footprints and bullies (子弹) in the wall, the officers left. The next day, the police called, "Please get dressed, David. We have to bring you to the police station and ask you about the lies you told us yesterday."
Do you know how the police knew David was lying?
