Police body cams — a randomized controlled study

Back in 2014, the city of Rialto, California carried out a study on the effects of police body cameras. They work.

Rialto’s randomised controlled study has seized attention because it offers scientific – and encouraging – findings: after cameras were introduced in February 2012, public complaints against officers plunged 88% compared with the previous 12 months. Officers’ use of force fell by 60%.

“When you know you’re being watched you behave a little better. That’s just human nature,” said Farrar. “As an officer you act a bit more professional, follow the rules a bit better.”

Video clips provided by the department showed dramatic chases on foot – you can hear the officer panting – and by car that ended with arrests, and without injury. Complaints often stemmed not from operational issues but “officers’ mouths”, said the chief. “With a camera they are more conscious of how they speak and how they treat people.”

The same applied to the public; once informed they were being filmed, even drunk or agitated people tended to become more polite, Farrar said. Those who lodged frivolous or bogus complaints about officers tended to retract them when shown video of the incidents. “It’s like, ‘Oh, I hadn’t seen it that way.'”

The Guardian