Safe, Pt. 2

S12, E2: Harry and Nikki struggle to find any useful evidence from the Post Mortems to help DS Wallace in his investigations. The frustration amongst the team builds. Then Levi, a young lad who had turned to Leo for help following the death of his older brother, is brutally killed and Leo blames himself for not protecting the boy better. Finally there's a breakthrough and the gang leader is arrested. When his community service is up, Leo keeps coming to the community centre to work with AJ and the kids.