HELP Security Camera Ideas suggestions?

Try rearviewsafety.com. They have 12V camera system for towing. They also have 12V DVR's that record from up to 4 cameras at the same time. Some can be accessed by wifi. They can be hidden inside the hard to reach areas inside the trailer or in a secure area or compartment in a automobile. I haven't looked lately but they used to have mini cameras that could be mounted in a vehicles head liner. I was looking at adding a system for towing plus a couple extra hidden cameras and a DVR. Because I work nights in a bad part of town I was getting stopped frequently by the local cops after leaving work. They were making up reasons to stop me just to see what I was up too. I want a camera system for towing and was thinking about adding a DVR and couple hidden cameras to record the cops just for my safety. I was also thinking about using the tow cameras and a couple extra hidden cameras with a second DVR in the trailer as well for a security system for the trailer when it is unhitched.