The issue focused on the cost of using the police to deal with "unlawful" gun crime.The issue of who can use the police to deal with people who are not law-abiding is the subject of a police review.The review of the use of the police to deal with those who are not law-abiding is being led by the Met's chief constable Sir Bernard Hogan-Howe.The review is being led by the Met's director of public prosecutions, Andrew Tyrie, and the director