When a police officer carries a weapon, she faces the risk of having that weapon turned on her by a criminal. It is also more obvious to a criminal that they need to shoot first against an armed officer whereas against an unarmed one they may be more open to listening and less likely to try and pre-empt being shot. So arming the police can sometimes make the police more vulnerable, rather than more protected.  If, as the opposing argument suggests, legally owned guns are part of the risk profile facing the police, measures ought to be taken to reduce the risk and restrict levels of gun ownership. The police have had a National (legal) Firearms Database since 2006 allowing them to assess whether someone they will be dealing with is a gun owner or whether the premises they are attending contains licensed firearms. Criminal misuse of illegal firearms is a different matter although, as has been argued, protection and safety are not the same as ‘armed’ and more armed police will probably mean more shootings and, equally probably, more mistakes and armed confrontations. [1]  [1] P. Squires and P Kennison 2010 Shooting to Kill: Policing, Firearms and armed response. Oxford, Wiley/Blackwell.