When his father died, Allen inherited a fortune, left his house and escaped to Europe, taking his riches with him, an ocean away from the tax man.

Once in Europe, he was good at lying low. So good, in fact, that it’s not known whether he’s alive today. There are few, if any, pictures available of a wealthy man who lived at least into his 80s.

Allen’s father, Sloan Allen, once owned Baum Iron Co., known today as Baum Hydraulics. The Old Market business dates to the days before Nebraska became a state.

Sloan and David Allen were known for being frugal, private and perhaps a little eccentric.

Consider this: Despite their wealth, father and son used to walk 25 blocks to and from work each day — no matter the weather — dressed in their best business attire. Some days, they would return home carrying cartons of fruit on their heads.

And this: Sloan Allen reportedly kept his own special pickle jar at the Omaha Club, and he was seen tying a kite to his big toe at the Omaha Country Club swimming pool and using the kite to navigate his way across the water.

And this: When David Allen vacated the home, he summoned employees to help him remove 17 large deep freezers.