NEW : John Smith will remain in custody until at least next Tuesday , it says . Postal Service a letter The 37-year - old threatened to ` ` " and kill '' a federal judge , an indictment alleges . Tests showed DNA was found with the threatening letter , the FBI says . He was arrested yesterday afternoon in Washington DC .
NEW : John Smith will remain in custody until at least next Tuesday , it says . The 37-year - old threatened to ` ` " and kill '' a federal judge , an indictment alleges . Tests showed DNA was found with the threatening letter , the FBI says . He was arrested yesterday afternoon in Washington DC .