" Tens of thousands of CCTV cameras, yet 80% of crime unsolved"

There is a growing assumption in Philadelphia that cameras are a panacea and once installed will lead to a drop in crime.

London's experience has shown otherwise.

thisislondon.co.uk: " Tens of thousands of CCTV cameras, yet 80% of crime unsolved":

London has 10,000 crime-fighting CCTV cameras which cost £200 million, figures show today.

But an analysis of the publicly funded spy network, which is owned and controlled by local authorities and Transport for London, has cast doubt on its ability to help solve crime.

A comparison of the number of cameras in each London borough with the proportion of crimes solved there found that police are no more likely to catch offenders in areas with hundreds of cameras than in those with hardly any.

In fact, four out of five of the boroughs with the most cameras have a record of solving crime that is below average.