Comment If you're serious, DO NOT DIY. (Score 4, Insightful) 235
Having been involved in the development of just such a system (I won't name names, but you've probably got plenty of their products in your home and work environment already) I can give you one extremely important piece of advice:
Forget all these "get yourself a bunch of webcams and X amount of diskspace".
No uncertified homebrew system will EVER produce footage that's admissable in court. Period.
Contact your local police department for a list of their approved equipment and vendors. The kind of solutions you're looking for do exist out of the box - the one I worked on had all the features you mention plus plenty of others - and you'll be able to use the footage in a "1st Evidence" capacity. Also consult with an attorney experienced in the field.
This is one time when you need to know the legal requirements as well as the technical ones, and as has been said many times before, Slashdot is a really bad place to go for legal advice. ;)
Forget all these "get yourself a bunch of webcams and X amount of diskspace".
No uncertified homebrew system will EVER produce footage that's admissable in court. Period.
Contact your local police department for a list of their approved equipment and vendors. The kind of solutions you're looking for do exist out of the box - the one I worked on had all the features you mention plus plenty of others - and you'll be able to use the footage in a "1st Evidence" capacity. Also consult with an attorney experienced in the field.
This is one time when you need to know the legal requirements as well as the technical ones, and as has been said many times before, Slashdot is a really bad place to go for legal advice.