A passing police car heard loud screams and responded immediately. When the police arrived at the scene, hey found Pete’s dead body in his backyard, with man knife wounds and blood everywhere. The officer immediately went to question the three neighbors that had been outside in the past thirty minutes.

　　Blake Smith had just finished painting his porch when the officer came. A young, polite man, Blake wiped his hands on his clean jeans before shaking hands, and said,” I really didn’t see or hear anything,” he added apologetically. Nelson Brown had been in his garden, right next door to the victim’s yard. He said,” I was in and out of the house. Weeding.” His hands were dirty. Then he added,” Inside, I was repairing a chair, It all must have happened when I was indoors. Sorry.”

　　Kenny Green’s story seemed less believable.” I was on a ladder, washing my windows,” themiddle-aged man admitted. The officer could see that Kenny’s yard overlooked the victim’s. But Kenny claimed,” I never looked over into Pete’s yard, nor did I hear anything.”

　　Now the officer believed that one of the guys was lying. Who was this man?

　　1.A 2.B 3.D 4.C 5.D