‘I was having a panic attack and the gun went off,’ says cop killer

The gunman who shot dead Met Police sergeant Matt Ratana after smuggling the weapon into a custody centre told a court he was having a ‘panic attack’ when he pulled the trigger. Louis De Zoysa, 25, blasted the New Zealand-born officer with his hands cuffed behind his back after his colleagues failed to find the weapon when they searched him. Sgt Ratana, 54, was just two months away from retiring when he was killed in the early hours of 25…