The Conversation. Explainer: what are the protocols around the use of a firearm for NSW police?

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As New South Wales police continue to investigate the alleged murders of Luke Davies and Jesse Baird, much attention has been paid to the alleged murder weapon - a police handgun.

Police allege the couple was murdered by Senior Constable Beau Lamarre-Condon last week, which has in turn provoked debate around the protocols around how, why and when police are able to use firearms.