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FBI agents searched a field outside of Detroit Monday afternoon in an effort to find the body of former Teamster boss Jimmy Hoffa, missing for nearly 40 years. Seems promising, right, coming off a tip from a former mobster? This is at least the 15th such tip since Hoffa vanished — including seven in and around Detroit. There have been six searches in the last ten years.

We took a quick look at the history of attempts to find Hoffa, mapping them below.

Some highlights (links to stories are on the map):

Shortly after Hoffa went missing in 1975, searches focused near Detroit, including a local restaurant (where he was reportedly put into a trash compactor) and a nearby horse farm.

The next most-promising region was New Jersey, home to one or two mobsters. There's the Giants Stadium rumor, of course, as well as a late-'70s search of a Jersey City landfill.

One report suggested that Hoffa was cut into pieces and dumped in a swamp in the Everglades.

Another said that he was put into junk car, compacted, and shipped overseas as scrap metal.

One of the most distant reports had Hoffa somehow being taken to Gardena, California, as a hostage.

None of those searches were borne out, of course.