Are personal info records of police department employees removed?

Someone who used to work dispatch at a police department told me that they told a potential employer that they wouldn't be able to find any info on them when they did a background check b/c when you work, or have worked for a police department, whether dispatch, staff, or officer, all of your personal records and information (like address, property tax, etc) are removed or restricted from public searches. They said this was in an effort to keep people that might have vengeful motives from finding out information about them . While this seems logical if you are a current employee, how would it be possible to keep future information about that person from coming up in public searches? I was just curious as to whether this was true or they were just blowing smoke up my a**. Thank you!