A young poor thief

Last weekend, I went to the theatre. The play was very interesting.
　　I put my coat on the seat. When I was enjoying the play, a poor boy was behind me who put his hand into my pocket.
　　 He is a thief！
　　 There was my all money and my phone in the pocket！
　　 But he was not too careful. When he was taking his hand off my pocket, the phone dropped. I heard that. I turned around and looked at the poor boy rudely. I saw red and he ran away quickly. But I did not call the police. Because he is too young and poor. I don't want a poor boy to stay in prison often.