Kids with nothing to do, no services, parents out at work. Hang out on streets, bored. Stuff goes down, you get stabbed and report to the police. No justice is served, perpetrators get away with it. Same situation for your mate. And the kid from round the corner. Why would you not lose faith with the system?
And the presenter: how can he sit there and say "starts with bad parents" and then seem incredulous that these kids should get involved in bad stuff? If you can accept that outside influences can cause this (bad parenting) then how can you also flip and totally blame those involved for actually doing it? Make your mind up.