D. B. The FBI Files is a collection of the official declassified Federal Bureau of Investigation files from the D. B. Cooper case. D. B. Cooper was the name used by the unknown individual who committed the only unsolved hijacking in the United States. This publication features the actual original scanned FBI files released under the Freedom of Information Act. D. B. The FBI Files is highly recommended for those interested in reading the official declassified FBI files related to the D. B. Cooper case.