BURLINGTON, Vt. -- A retirement community resident made ricin and tested the deadly toxin on her neighbors by putting it on their food or in beverages over a period of weeks, investigators said. Betty ...

The deadly toxin ricin is behind attacks on high-profile officials once again, this time in letters addressed to President Obama and New York City Mayor Michael Bloomberg. This isn't the first time ...

Ricin is back in the news with reports that envelopes suspected of containing the poison were sent to the White House and top defense officials. A preliminary analysis showed the substance was castor ...

A motel patron hospitalized after possible exposure to the toxin ricin is "holding his own" in intensive care, his cousin said Saturday as investigators expanded their probe into why the strictly ...

BURLINGTON, Vt. — A resident of a Vermont retirement community made ricin and tested the deadly toxin on her neighbors by putting it on their food or in beverages over a period of weeks, investigators ...

Ricin is one of the most toxic substances known to science with an LD 50 between 3 and 30 µg/kg in humans. Potentially lethal when inhaled, ingested, or injected, death can occur within 36 to 72 hours ...

Congressional officials confirmed that a letter addressed to Senator Roger Wicker tested positive for ricin, a potentially fatal natural toxin. According to the Associated Press, the envelope was ...

The news that three envelopes intended for President Trump, Secretary of Defense James Mattis, and Chief of Naval Operations Adm. John Richardson triggered alarms in Washington yesterday. The ...

Authorities at the Pentagon found at least two packages suspected of containing ricin, a spokesman said Tuesday, with the news coming amid a scare at Sen. Ted Cruz's office in Houston involving a ...

Ricin is a deadly poison and fairly easy to make, but it’s a crude and clumsy weapon, according to bioterror experts. A letter sent to President Barack Obama tested ...

Cheng LeReuters A former New York University student was sentenced to 16 years in prison Tuesday for trying to buy the lethal poison ricin from a black market website so he could commit “100 percent ...