Prosecutors revealed other details of their operation in court in Detroit, where the other eight charged Hutaree members entered not guilty pleas.
Among other things, prosecutors alleged that Josh Stone posted a message on the Hutaree Web site that the group was ready "to go to war." That prompted the action by the Feds, ABC reports.
Another of the charged men, Kristopher Sickles, allegedly "killed his cat so he could 'see if he had it in him to kill something he cared about,' prosecutors said, according to ABC.
Late Update: The order of detention for Piatek offers specifics of what authorities seized, including "46 firearms (rifles, shotguns, and handguns) including an AK 47 and two 50 caliber rifles, in excess of 13,000 rounds of live ammunition, a crossbow, a sword, knives, smoke grenades, a signal light, military-like clothing, gear, equipment, and supplies, and CD's and DVD's regarding militia activities."