The FBI has announced that an envelope addressed to the White House has tested positive for ricin, and has been quarantined by US Secret Service personnel. A coordinated investigation has since been initiated by the FBI.
Although the letter initially tested positive for the deadly poison, official test results will be available in 24 to 48 hours. According to a law enforcement official, preliminary tests are “unreliable” and often result in false positives.
In an intelligence bulletin obtained by AP, the FBI says that both letters say: “To see a wrong and not expose it, is to become a silent partner to its continuance.” Both are signed, “I am KC and I approve this message.”