On Saturday 25 July 2015 a man was shot dead in LA. News sources later identified the crime – said to be  in retaliation for the murder of a gang member – as the start of a killing spree.

By midnight on Sunday, shootings in the US had left 197 people injured and left 87 dead.

This compelling documentary examines America’s contentious gun laws by telling the story of that weekend, via 911 calls, eyewitness accounts and police interviews.