During the recent protests on Wall Street in America Police officers recorded arrests with video cameras on their mobile phones. But should they have to risk damaging their personal phones for a few minutes of low quality video? If the officers used body worn cameras they could record evidentially safe footage and have their hands free to help colleagues.

Protesters' accusations of unwarned arrests were discarded by video footage. Police filmed themselves with camcorders warning protesters they would be arrested if they did not comply.

There has been a lot of discussion about body worn cameras and how they can be used to clear false allegations against officers. "It has often been the case that cameras vindicate the police rather than indict them," said Eugene O'Donnell, a professor in the Department of Law at John Jay's College. "They can use it to identify people when they break the law, or counter allegations that there has been improper use of force."

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