Detective Danny Clover is called to a particular park bench in Central Park, New York. A crowd of onlookers is forming. Sergeant Muggerman is already on the scene. Muggerman says "Over here, Danny. Right there near the bench". A young boy says "I found the knife. I didn't pick it up". Danny says to Muggerman "Who is the boy?" The boy says "I'm Paul Gilbert. I haven't been home from school yet". Danny says "Well, you'll go home in a squad car, Paul". Muggerman says "I promised him with the siren, Danny". Danny says "With the siren. What happened, Paul? How did the knife get there?" Paul says "I saw the man take it out of his own back and throw it down. Then, he staggered away". Muggerman says "Did I show you this, Danny? All this blood. Wherever he is, he's hurt real bad". Danny turns back to Paul and says "I want you to think for a minute, Paul. What did this man look like?" Paul says "Tall, I guess. Yeah, I guess that's all. He was tall". Danny says "Most grown-ups are tall, aren't they, Paul?" Paul says "All of them, except for midgets". Danny says "One more thing, Paul. Was there anyone with this man? Think hard." Paul says "No, I don't think so". Muggerman says "Well, you told me that there was a...." Paul says "The other man I saw wasn't with him. The other man in the hat just watched him. Then the man in the hat ran away. He wasn't with him". Danny asks "What did the man in the hat look like?" Paul says "He had a hat. That's all I know. I got scared. I ran". Muggerman says "That's right, Danny. Paul ran right into Officer Curcio on the beat. Almost knocked him down. Curcio came back, saw the blood on the bench, the knife, and phoned it in". Danny says "Paul, did you know the man, the man with the knife?" Paul says "No, uh-uh. I usually don't come home from school this way. We had an after-school game over there on the playground". Danny says "Get the squad car, Muggerman, for Paul, with the siren".