Jagga's bad fate - Detective Riddle

Jagga is found unconscious in front of a store at two in the morning. His head is bleeding and there's a brick lying next to him. When the police arrive, they carry Jagga to jail. Why did they arrest him?

Jagga was trying to rob the store. He threw a brick at the store's bullet-proof window and it bounced back and hit him. Jagga was trying to rob the store. He threw a brick at the store's bullet-proof window and it bounced back and hit him.