We conduct early-stage criminal background checks, credit checks, and drug tests on all of our candidates. Is there anything you would like to disclose at this time?

For obvious reasons, law enforcement agencies need to be very cautious on who they hire. There is a chance that much of the information you are going to access could be confidential and dangerous if put into the wrong hands. You will be working with the public, and with vulnerable individuals. Assure the interviewer that you are most willing to comply with any form of background check they require.