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Leo returns to work after recovering from his injuries. He finds himself working on the case of a shattered body of a young woman, Ruth Gardiner, who is thought to have fallen off the roof of a block of flats. Leo discovers that the girl was shot in the head before being thrown off the roof and the investigation into her death is reopened. Leo begins to wonder if there is a cover up going on when it looks like the girl could of been one of Phil's informants and DI Neill is reluctant to pursue that line. Neill finds the investigation leading him to Alex Webb after a gun is found.