Regular Sydney news items report a bloody gang war with attacks and murders of high profile crime figures as well as innocent bystanders. What is happening? What is the carnage about? Mark Morri and Josh Hanrahan have documented this war and now tell the story of drugs, murders and revenge within the feuding gangs and clans in their book The Bloodiest Gang War. They talk to retired Detective Superintendent Deb Wallace who dealt with gang wars herself while in the NSW police force.