Sergeant Colon and Nobby had gone off-duty, to everyone’s relief. Colon in particular had great difficulty with the idea that you went on investigating after someone had confessed. It outraged his training and experience. You got a confession and there it ended. You didn’t go around disbelieving people. You disbelieved people only when they said they were innocent. Only guilty people were trustworthy. Anything else struck at the whole basis of policing.