Investigation
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Investigation
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- Smuggling + Investigation
- Haunted places + Investigation
- Parapsychology + Investigation
- Parapsychology + Investigation + History
- Airplanes, Military + Accidents + Investigation
- Assassination + Investigation
- Missing children + Investigation
- School shootings + Investigation
- Murder + Investigation + Press coverage
- Art + Forgeries + Investigation
- Child sexual abuse + Investigation
- Sexual harassment + Investigation
- Art thefts + Investigation
- Drug traffic + Investigation
- Theft + Investigation
- Murder + Investigation
- Kidnapping + Investigation
- Computer crimes + Investigation
- Aircraft accidents + Investigation
- Death + Investigation
- Sex crimes + Investigation
- Missing persons + Investigation
- Boating accidents + Investigation
- Rape + Investigation
- Arson + Investigation
- Commercial crimes + Investigation
- Occultism + Investigation
- Railroad accidents + Investigation
- Attempted murder + Investigation
- Muder + Investigation
- Murder + Investigation -- United States -- Drama
- Murder + Investigation -- England -- Fens, The -- Fiction
- Parapsychology + Investigation
- Murder + Investigation -- Wisconsin -- Fiction
- Missing persons + Investigation -- Russia -- Fiction
- Murder + Investigation -- California -- Coronado -- Case studies
- Railroad accidents + Investigation -- Fiction
- Rape + Investigation -- Drama
- Smuggling + Investigation -- Fiction
- Parapsychology + Investigation -- Great Britain -- History -- 20th century
- Rape + Investigation -- North Carolina -- Durham
- Murder + Investigation -- California -- Case studies
- Aircraft accidents + Investigation -- Fiction
- Missing persons + Investigation -- Pacific Crest Trail
- Computer crimes + Investigation -- Comic books, strips, etc
- Arson + Investigation -- Fiction
- Murder + Investigation -- England -- Fiction
- Missing persons + Investigation -- Maryland -- Drama
- Murder + Investigation -- Spain -- Fiction
- Murder -- England -- Sussex -- Investigation -- Fiction
- Missing persons + Investigation -- England -- Fiction
- Murder + Investigation -- Antarctica -- Drama
- Missing persons + Investigation -- United States -- Fiction
- Missing persons + Investigation -- Drama
- Murder + Investigation -- Colorado -- Boulder
- Murder + Investigation -- Florida -- Fiction
- Murder + Investigation -- Arizona -- Fiction
- Murder + Investigation -- Great Britain -- Case studies
- Haunted places + Investigation
- Murder + Investigation -- Washington (D.C.) -- Fiction
- Computer crimes + Investigation -- United States
- Murder + Investigation -- Pennsylvania -- Philadelphia -- Drama
- Sex crimes + Investigation
- Computer crimes + Investigation -- United States -- Case studies
- Murder + Investigation -- New York (State) -- New York -- Fiction.?
- Murder + Investigation -- Massachusetts -- Boston -- Drama
- Murder + Investigation -- Minnesota -- Minneapolis -- Fiction
- Missing persons + Investigation -- Florida -- Fiction
- Murder + Investigation -- Massachusetts -- Fall River -- Juvenile literature
- Murder + Investigation -- Massachusetts -- Fall River -- Drama
- Drug traffic + Investigation -- Fiction
- Missing persons + Investigation -- England -- Cambridge -- Fiction
- Parapsychology + Investigation + History
- Missing persons + Investigation -- England -- Norfolk -- Fiction
- Murder + Investigation -- Turkey -- Fiction
- Murder + Investigation -- Computer games
- Assassination + Investigation -- Mexico -- Fiction
- Aircraft accidents + Investigation -- Greenland -- Fiction
- Missing persons + Investigation -- New Jersey -- Fiction
- Murder + Investigation -- Idaho -- Moscow