Many UK studies have concluded same. But as with this article they always try to justify it anyway, despite the enormous cost of installing these police state grids. Let your state and local authorities know that not only do they trample the 4th amendment (treating all citizens like criminal suspects, without probable cause), but they do not deter crime or even catch many criminals.

The "security merchandisers" are busy reaping profits from the trampling of your liberties by seducing authorities with the latest toys and technology.

BBC article that is similar here.

Cato Institute podcast on the ineffectiveness of surveillance cameras here.

Arm yourself with this evidence to refute the lame justifications being used to install a Homeland Security local, as well as national, government, that is fascist.