BURLINGTON, Vt. (AP) — 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.

A woman suspected of sending an envelope containing the poison ricin, which was addressed to the White House, has been arrested at the New York-Canada border. The woman is also suspected of sending ...

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 ...

About one million tons of castor beans are processed every year, worldwide. Ricin is part of the waste from the beans when castor oil is made. Sometimes this is called “mash.” Less than a pinpoint can ...

Potent biological protein toxin It inhibits the body from making protein resulting in cell death Category B bioterrorism agent and Schedule I chemical warfare agent Ricin is derived from the waste ...

Ricin is a deadly poison and fairly easy to make, but it’s a crude and clumsy weapon, according to bioterror experts. Subscribe to read this story ad-free Get ...

WASHINGTON - JANUARY 12: U.S. Sen. Roger Wicker (R-MS) (R) speaks as Senate Minority Leader Sen. Mitch McConnell (R-KY) (L) listens during a news conference on Capitol Hill January 12, 2010 in ...

Ricinus communis, a perennial flowering plant native to East Africa and India, appears innocuous at first glance. The wide-leafed plant’s two-meter stalk bears a large seed, deceptively known as a ...

Ricin, contained in a package addressed to the White House, was intercepted by investigators on Saturday, the FBI said. The poison, found in castor beans, could "potentially be used as a biological ...