I was at a cvs and did not hit any car. The manager did not like me gave a tape to the police and said there was a glitch in it. It happened to skip about 10 seconds or more that shows up at the same time I would have been going in reverse in my car but it did not show the length of time I went back it went from me going only so far back then moving forward. I have the tape how can I find out if it was tampered with? I have the copy the police provided.