I must have a cam for the drivers side window. I must have another cam on the rear of SUV. Preferably on the license plate. All cams must stay on at all times. I saw that some cams only come on when the car is in reverse- that will not help me. Night vision/day with a decent picture. As long as it can show a clear face in the car behind me- that is all I need. I must show proof of who is following me. I know who it is, but court needs proof to help protect me. I can buy 2 or 3 cams if needed. Any suggestions on what to buy? Can spend $100.00-$125.00 each.