
The envelope, which was intercepted at an off-site Capitol mail facility, tested positive three times, according to the Associated Press.
Senators were briefed on the threat in a closed-door meeting Tuesday night. Coming a day after two blasts killed three and wounded 176 people at the Boston Marathon, the ricin-tainted letter spurred renewed fears about terrorism.
Senator Claire McCaskill said authorities have a suspect, but she did not say if an arrest had been made. Terrance Gainer, the Senate sergeant-at-arms, said in an emailed message to Senate offices that the envelope had no obvious suspicious outside markings, bore a Memphis, TN., postmark and had no return address.










Comment: While the Powers That Be want to remind us of the post-9/11 terror when anthrax was sent anonymously to members of Congress, we remember that the anthrax used in those letters came from Fort Detrick.
We also remember the Wood Green 'Ricin Terror Plot', invented out of whole cloth by British operatives:
Ricin! The Inside Story of the Terror Plot That Never Was