There are things that LE may have access to (CCIC/NCIC) information that are improper to relate to non-LE. Privacy Act covers a lot of personal related information and under what circumstances it can be provided and to whom it can be provided to.

How did the LEO contact you? If you were not under arrest and you were not driving, you had no obligation to provide any information. I can only assume that you provided information to make the situation go away. I assume the information you provided was not related to criminal activity.

Do you know for a fact it was the LEO who provided the information to your employer? Why do you think the LEO contacted your former employer? Can you prove the answer to either of these two questions?

Bottom line, if you are hiding something from an employer that you know the employer will fire you for as soon as they find out, then you will spend every moment on that job sitting on a time bomb, just waiting for the thing to go off. Be up front with your next employer and move on.

Be safe.