Complete the text with the right modal verb and the infinitive.
Yesterday night the bank was robbed and John Brown was sent to investigate. Now he is reporting the news to his boss. "That (1) (должно быть, был) a professional because he did a very clever job. He (2) (должно быть знал) exactly what he was doing because he didn't leave any clue behind him. It (3) (не может быть, чтобы был) Teddy Dead because he is in prison now. I thought it (4) (возможно был) Freddy Claw but he was in hospital at that time. So it (5) (не мог быть) him either. I (6) (не могу быть) sure, but it (7) ' (возможно был) Sky Steve. You know, he is the only one who doesn't have an alibi. (8) (Можно) I bring him to the police station?"