The 'why' of ricin cache is still a puzzle

Beyond the items found in Roger Von Bergendorff's motel room here, authorities have revealed little about how the 57-year-old ended up unconscious and in critical condition, possibly from exposure to the poisonous substance ricin.

Von Bergendorff -- a graphic designer who was struggling financially -- was hospitalized on Feb. 14 after struggling to breathe. Police say they found several vials of ricin and the castor beans needed to make it in Von Bergendorff's room at the Extended Stay America Hotel.

A book in the room was marked at a section about the poison -- 500 micrograms of which (about the size of the head of a pin) -- can kill a human.

There was no apparent link to terrorism, officials said, and they have yet to find any more ricin.

FBI spokesman Juan Becerra said Sunday that the focus of the investigation was shifting to Utah. Authorities -- dressed in hazardous-material protection suits -- searched a home and garage-size storage units in the Salt Lake City suburbs where Von Bergendorff lived.

Von Bergendorff spent much of his adult life in Orange and San Diego counties. Public records indicate that several tax liens were filed against Von Bergendorff in San Diego County in the mid-1990s. He also filed for bankruptcy in 2000, records show.

After being evicted from a Utah apartment a few years ago, he moved into his cousin Tom Tholen's basement, said Brad Ewell, one of Tholen's neighbors in Riverton, Utah.

Von Bergendorff didn't pay rent, ran up the Tholens' phone bill using dial-up Internet service and stayed longer than Tholen expected, according to Ewell. "The Good Samaritan got bitten," he said.

Neighbors called Von Bergendorff standoffish. A hulking man with wavy hair, he worked with computers and delivered pizza. Much of his time was spent with his pets, including a German shepherd.

But Von Bergendorff "dressed normal; he wasn't a shaved-head supremacist guy or someone you'd think would cause trouble," Ewell said. Von Bergendorff joined a Mormon congregation and told neighbors he had overcome a drug addiction.

Eventually, Von Bergendorff moved into a neighbor's camper trailer. The neighbor, John Walster, asked Von Bergendorff to leave in August 2006, but did not specify why, according to the Salt Lake Tribune.