Jack Sandner recalls that when he signed up with the Merc, people asked him if he'd joined the wrong club.

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Sandner was not charged in connection with Koechner and Zoee's disappearance, but was taken into custody on an outstanding forgery warrant, Hughes said.

NPR: Sheriff: Missing Missouri Mother Faked Abduction

Jack Sandner was playing golf one afternoon when a Board of Trade member approached and prodded him to get the Merc to up its offer.

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Authorities believed Koechner and Zoee were with her ex-husband, Devon Sandner, 37, who is Zoee's father, and that they could be in danger because of a history of domestic violence, Chariton County Sheriff Chris Hughes said.

NPR: Sheriff: Missing Missouri Mother Faked Abduction

Sandner 66, occupies the south tower.

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Sandner issued a letter that year to members--clearing firms, traders, investment banks and so on--prodding them to accept electronic trading and to consider going public as a way to (1) break logjams on how to run the place and (2) get rich.

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Sandner shooed him off.

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