Eddie Taylor answers this as to the types of information found.Given the records available to an investigator, and the questions that must be answered on the forms, quite a bit of information is available. Good investigators find quite a bit, often including things the applicant doesnu2019t remember or realize is available.Keep in mind that lying on the application form (usually an SF-86) or during an interview is a criminal offense. Donu2019t try to hide things, because that can cause you problems. One of the things they are looking for is whether the applicant has something in his/her background that the applicant doesnu2019t want exposed u2022 because that would an item that could be used to blackmail someone to expose classified information!If someone has some dark secret that should not be discovered, applying for a security clearance is a bad idea.