Chris Cahill: Police Association president says new gun registry will be a key tool to reducing crime

There is optimism the country's first digital gun registry will put criminals under the pump. The online registry goes live tomorrow, aiming to track nearly 240,000 licensed gun owners. It relies upon people registering within five years. Police Association president Chris Cahill told Tim Dower it'll be a key tool to reducing crime, as it would track those selling guns to criminals. LISTEN ABOVE  See omnystudio.com/listener for privacy information.