Some things to think about for video:
1) Is it encrypted or tamper proof? That can and will be challenged by even a reasonably competent defense attorney.
2) Can the video be easily reviewed on current technology?
3) Does the camera have good low light capabilities? Most do not unless you are in a reasonably lit area.
I have used the VieVu for some time. Good camera meeting the above save low light.
However, it begs the challenge of your prosecutor being so incompetent that they need an electronic crutch. It seems your chief needs to address this with the prosecutor's office, or make them pay for the equipment. Through my experience and working with others that new prosecutors of the "me" generation have the mindset that if it isn't on video, they can't make things happen.
Neo-pagan, FORMER Libertarian, Cop, Gun Owner, Jewish Heritage - I'm the small talk at parties!
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It's healthy to be distrustful of the federal government.