I live in a cul de sac and everyone in my street turns round outside my house. My car has been hit several times, last time was a bumper scuff requiring it to be sprayed. Its just happened again. No one owns up and I just get a nasty surprise the next time I go to the car. I want to install a camera in the back window that continuously records with time and date stamp if possible. Can wire straight off the battery as thats in the back of the car (5 series touring). Any suggestions? I already have a cheap dash cam with front and rear cameras but that turns off with ignition and only records and re records over an hour.