For its investigation, Left for Dead, Reveal examined information collected from the National Missing and Unidentified Persons System, which contains more than 10,000 unidentified cases across the U.S.
Federal data tracks thousands of unsolved missing persons cases and unidentified bodies. Use our Web tool to search for potential matches.
At least 74 workers have died in the Bakken oil fields since 2006, according to data obtained from Canadian and U.S. regulators.
See if your state requires firearms training, mental health exams and background checks for armed security guards.