In today's episode we examine the gang culture of east London to look for clues as to what happened to the schoolboy, who was apparently caught up in this murky world.

Host: John Simpson, the Times' crime correspondent.

Investigation: If you have something you’d like to tell us you can reach the podcast team by phone, WhatsApp, email and Instagram: 07535-785-774, [email protected] and @wkcjdtips.

Anyone with information can also contact the police on the dedicated incident room number of 020 8345 3775, or 101. You can also make contact via Twitter @MetCC. To give information anonymously contact Crimestoppers on 0800 555 111 or online at crimestoppers-uk.org. The Metropolitan Police Service offers a £20,000 reward for anyone who can provide information leading to the identification and conviction of the person(s) responsible for CJ's murder.

Anyone concerned they may know of a child being the victim of grooming can contact the police on 101 or the NSPCC.

Original Music by Cam Shuck - satellitestudios.co.uk.

Clips used: UK Drill YouTube channel, Olympic YouTube Channel, BBC3.

Additional music: Jordan Powell, Chris Zabriskie (licensed under Creative Commons) and Breakmaster Cylinder.

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