Better to have cameras than not; maybee...... juries can be played by selective use of cams, excluding other cam footage, and plain old laying a trap for the unwary citizen.
You asked: I read the news. Google for you:
http://www.forbes.com/sites/ka...
"But it goes both ways; video – or the lack of it – can also damn officers. Two on the Daytona Beach force lost their jobs after a video mysteriously blanked out in the middle of an encounter with a woman who allegedly hid a bag of cocaine in her mouth; she said the officers knocked her down, shoved a flashlight between her lips and kicked her in the head, but that part of the encounter wasn’t caught on film thanks to one officer failing to turn his camera on and a “malfunction” with the other officer’s camera midway through the arrest. A forensic analysis of the cam showed that the “malfunction” was caused by the officer shutting it down. Chief Chitwood has said the policy there is, “If you turn it off, you’re done.”"
That's Daytona. In Oakland. Mysteriously Shut Off Camera Syndrome doesn't hurt and officer much:
http://arstechnica.com/tech-po...
"OAKLAND, Calif.—Over the last two years, the Oakland Police Department (OPD) has disciplined police officers on 24 occasions for disabling or failing to activate body-worn cameras, newly released public records show. The City of Oakland did not provide any records prior to 2013, and the OPD did not immediately respond to Ars’ request for comment.
http://www.eastbayexpress.com/...
"Hargraves was found to have violated policy by taping over his nametag, and Wong was found to have acted improperly by failing to report the incident to internal affairs and also turning off Hargraves' lapel camera"
http://crooksandliars.com/susi...
"However, the above video, which shows several officers with their body-mounted cameras turned off – a departmental violation - is just the latest example of Oakland police officers not wanting any accountability.The video is also a clear demonstration of just how high tensions are between Oakland police and citizens."
http://www.nytimes.com/2014/12...
"In other cases it was the absence of video that got the officer in trouble. An officer in Daytona Beach, Fla., was forced to resign after he was caught turning off his camera at critical moments. An Albuquerque officer who shot and killed a woman in April — and whose camera was off at the time — was fired on Monday after being investigated for not complying with department orders that required officers to record all interactions with civilians.
But even when video does exist, it is often not decisive. In the case of Mr. Garner, the Staten Island man who died in July after a police officer put him in a chokehold, a video of the encounter taken with a bystander’s cellphone and viewed millions of times was enough to stir visceral outrage — but not to secure an indictment."
The records show that on November 8, 2013 one officer was terminated after failing to activate his camera. Less than two weeks later, another resigned for improperly removing the camera from his or her uniform. However, most officers received minor discipline in comparison."
Antenna removal:
http://www.latimes.com/local/l...
"os Angeles police officers tampered with voice recording equipment in dozens of patrol cars in an effort to avoid being monitored while on duty, according to records and interviews..
An inspection by Los Angeles Police Department investigators found about half of the estimated 80 cars in one South L.A. patrol division were missing antennas, which help capture what officers say in the field. The antennas in at least 10 more cars in nearby divisions had also been removed."