In addition, there is substantial research showing that law enforcement strategies that focus on deterring illegal gun possession reduce violent crime.
CNN: Mass murder and powerful firearms
2.
Similarly, if police flood into estates with historically high rates of burglary or violent offences, their presence will allow them to detect yet more crime while drug possession in leafy suburbs goes unnoticed.
BBC: What's the price of DVD players got to do with crime?
3.
On 17 July, 21 arrests were made during a police operation at an EDL protest in Dudley - 17 for violent disorder, two for affray, one for a public order offence and one for possession of an offensive weapon.