LAS VEGAS - A loner who long had struggled financially, Roger Bergendorff told investigators that he found making ricin an "exotic idea." So he researched the deadly toxin online. He bought "The Anarchists Cookbook." He ordered castor bean seeds -- ricin comes from the processed beans' waste -- apparently posing as a fictitious customer: "Roger's Patio and Garden." He donned a mask and gloves, mashed the beans with acetone, dried out the oil and stored the light-colored powder in a polypropylene container. According to a six-page federal complaint released Wednesday, Bergendorff fell ill while keeping a "crude" form of the...