Gang rehabilitation leader Billy McFarlane believes he knows what's behind a rise in New Zealand gang numbers - and he identified the issue years ago. ➡️ SUBSCRIBE: https://bit.ly/NewshubYouTube You're joining us on the official YouTube channel for Discovery NZ's Newshub. Here you will find livestreams and news videos from our award-winning team of journalists working across our bulletins and shows - The Project NZ, AM, Newshub Nation, and The Hui. * Sign up for the Newshub Now newsletter: http://bit.ly/NewshubNow * Follow Newshub on Facebook: http://bit.ly/NewshubFacebook * Follow Newshub on Twitter: http://bit.ly/NewshubTwitter * Follow Newshub on Instagram: http://bit.ly/NewshubInstagram * Follow Newshub on TikTok: http://bit.ly/NewshubTikTok For all footage licensing enquiries please visit: https://www.discoverycorporate.co.nz/home/contact-us/commercial-footage-request.html