On Monday morning, Steven, a thief, went to a bookstore. The bookstore was very crowded. He took a book from the shelf secretly and looked around. Then, he put the book into his bag quickly.
 Thereafter, Steven walked towards the exit and kept his head down. Suddenly, the alarm went off. Everyone heard a loud ‘beep’ sound. Soon, the security guard of the bookstore stopped Steven and asked, “May I check your bag?” Steven’s face turned white with sweat, looking nervous. The security guard found the book in Steven’s bag and asked, “How did you get this book?” Steven cried out,” I don’t know. I think someone put it into my bag!”
 Meanwhile, Karson, an off-duty policeman came to them and said,” I keep on watching you over there!” Steven was scared and tried to escape but the security guard grabbed his arm. After watching the CCTV cameras, they saw Steven take the book. The manager then called the police.
 The police arrived and arrested Steven on suspicion of theft. Then they went to the police station with the policemen. The manager was grateful to Karson and thanked for his help.