NEW : Laura Laughlin will stay in custody until Wednesday , FBI says . The 37-year-old threatened to `` injure and kill '' a federal judge , an indictment alleges . Tests showed ricin was found with the threatening letter , the FBI says . He was arrested at least next Tuesday 36 to 48 hours in U.S. state .
NEW : Matthew Buquet will stay in custody until at least next Tuesday , FBI says . The 37-year-old threatened to `` injure and kill '' a federal judge , an indictment alleges . Tests showed ricin was found with the threatening letter , the FBI says . He was arrested Wednesday afternoon in Washington state .