Having had the N/S doors of my new CX5 recently "keyed" by a couple of school kids, I was delighted to be able to take CCTV footage from my home security system to the school and provide enough evidence to get them identified & confess to the police.
This set me thinking about putting CCTV in my car and, after a lot of research, I found (hopefully) the perfect system... Small, unobtrusive, detachable and with enough memory to capture High Res images for hours on end. If you're thinking about going along this route you could do a lot worse than buy a Mini 0801 or mini 0803.... Check out techmoan on youtube for more info, and this site ...
http://stores.ebay.co.uk/COMBI-LTD/Car-Camera ... if you are looking to purchase..