Jesus, you know you are like a parrot on this and not everyone has the time to do this kind of research for things that are matter of fact / common legal knowledge.
It's like when I have talked science or even math and people say prove it. A lot of deep science things are not available easily online without a paid subscription.
Hell, even simple news stories become unavailable online. You have to request a copy and pay a fee with the media outlet.
There is a big reason many dedicated surveillance cameras don't offer even audio on-board, but their multi-function counterparts do. Video in public is pretty acceptable, but audio is not in many places/situations.
Let's just focus on the popular Nanny cam debate and someone claiming what happens in their home by someone that is employed should be public:
http://www.legalmatch.com/law-library/article/babysitternanny-camera-legality.html
Audio is a big no-no is many places even for public servants depending on the court you land in.
http://www.rcfp.org/browse-media-la...ide/legal-limits-recording-conduct-and-conver
Also a big trump card with seizure of a device is if the officer can state he is seizing that device because he believe you have recording of a crime in progress, then courts many times have allowed that. They cannot delete/destroy the device though.
Fourth amendment is also misunderstood as well. Many still assume a cop can't search a vehicle if he sees something illegal inside it. That even if they think you were involved in a crime, they cannot detain / search you. That you do not have to provide your name/ID while driving a car.