On a weekend at the start of March, two murders caused public outcry. Two 17-year-olds were killed in two different attacks in London and Greater Manchester. Politicians said knife crime was out of control and called for urgent action. Last week two teenagers were found guilty of murdering Jodie Chesney, the girl killed in London. For the past few weeks the BBC’s Dan Johnson has been covering the trial of Jodie’s killers at the Old Bailey. In this episode Dan tells us what happened to Jodie in her last moments with her friends in the park, and explains what Jodie's murder says about a world of petty crime and violence where innocent people are caught in the crossfire.

Presenter: Matthew Price