The killing caused widespread public outrage. The coroner's inquest passed a verdict of willful murder against British Prime Minister Lloyd George and against certain members of the RIC. Michael Collins later ordered his squad of assassins to uncover and assassinate the police officers involved in the attack. RIC District Inspector Oswald Swanzy, who had ordered the attack, was fatally shot, with Mac Curtain's own revolver, while leaving a Protestant church in Lisburn, County Antrim, on 22 August 1920, sparking what was described by Tim Pat Coogan as a "pogrom" against the Catholic residents of the town. Mac Curtain is buried in St. Finbarr's Cemetery, Cork.