"Paul Kevin Curtis... freed after initially being accused of sending ricin-laced letters... has long been feuding with a fellow entertainer..."

"... who is now a focus of the inquiry."

The genesis of the feud between Curtis, 45, and Dutschke, 41, was unclear. Curtis told the Associated Press that they had worked together at Curtis' brother's insurance office years ago. Curtis said Dutschke told him he owned a newspaper and showed interest in publishing his book about what Curtis believes is an underground market to sell body parts....