If you'll go to the link above, you'll get to read Marilyn Monroe's FBI file, as found through the FREEDOM OF INFORMATION ACT. You may feel that it's terrible that any person be so invaded in their privacy, and all wrong about obtaining someones file.
Right or wrong, the FBI files that you can obtain through the Freedom of Information Act can be very valuable to creating a family history or a biography.
IF THE PERSON WAS IN THE MILITARY but their MILITARY RECORDS "BURNED UP IN A FIRE" try an FBI file instead.