Chris Cahill: Police Association President on the spike in homicides in the past three weeks and increase in violence over summer

New Zealand averages a murder or manslaughter every five days - but over the past three weeks, there has been a spike in homicides.   Police Association President Chris Cahill tells Tim Dower about the potential reasons for an uptick in violence over summer, and the strain it creates on police resources.  Listen above. See omnystudio.com/listener for privacy information.