Not the sharpest tool in the box
It was a while ago, but I have worked with a couple of UKI police forces to implement information databases. It was made clear to me, and I was told it was always made VERY clear to database users, that every user interaction would be logged. If you search for yourself, anyone you know, or anyone else that you cannot justify as part of an ongoing case then you will be in trouble. At that time, I don't believe there was a mechanism to trawl through the logs to actively look for improper access. There may be some process to do that now, but even if there isn't, all access is logged and will be used in court as evidence against you.