Federal authorities think they have a motive in a rash of threatening letters last October: a $63,000 stock loss when a bank went belly up.
They've arrested Richard Goyette in New Mexico. He's charged with knowingly and intentionally conveying false and misleading information.
Authorities say he's the one who sent 65 threatening letters to banks and federal regulators. Sixty-four of them contained a white powder, later determined to be the main ingredient in chalk.
Goyette waived his right to hearings today in Albuquerque, and will be charged in Texas, where the letters were postmarked.
Officials say Goyette had written an angry e-mail to federal regulators saying he was going to "reclaim" money he said had been "stolen" when Washington Mutual Bank was seized by the government.
The note included his name and mailing address.