ricin

Federal agents raid a home in New Boston, Texas in connection with the investigation into ricin-laced letters sent to Mayor Michael Bloomberg and President Obama on May 31, 2013. (credit: CBS 2)

Texas Woman Admits Sending Ricin To Obama, Bloomberg

Shannon Guess Richardson pleaded guilty in federal court in Texarkana, Texas, to a federal charge of possessing and producing a biological toxin.

12/10/2013

Federal agents raid a home in New Boston, Texas in connection with the investigation into ricin-laced letters sent to Mayor Michael Bloomberg and President Obama on May 31, 2013. (credit: CBS 2)

Report: Plea Deal For Texas Woman Accused Of Sending Ricin-Tainted Letters

A Texas woman reportedly has reached a plea deal with federal prosecutors on charges that she sent ricin-tainted letters to President Barack Obama and Mayor Michael Bloomberg.

11/23/2013

Federal agents raid a home in New Boston, Texas in connection with the investigation into ricin-laced letters sent to Mayor Michael Bloomberg and President Obama on May 31, 2013. (credit: CBS 2)

Texas Woman Indicted In Obama, Bloomberg Ricin Letters Case

Shannon Richardson, 35, is charged with two counts of mailing a threatening communication and one count of making a threat against the president of the United States.

06/28/2013

FDNY Patches (file / credit: Mario Tama/Getty Images)

Police: White Powder Sent To FDNY Headquarters Deemed Not Hazardous

FDNY sources tell WCBS 880’s Rich Lamb that an envelope containing white powder was mailed to a member of the department at the Fire Prevention section.

06/10/2013

Federal agents raid a home in New Boston, Texas in connection with the investigation into ricin-laced letters sent to Mayor Michael Bloomberg and President Obama on May 31, 2013. (credit: CBS 2)

CBS News: Actress Arrested In Connection With Ricin Letters Sent To Bloomberg, Obama

Shannon Guess Richardson, an actress and mother of five children, was arrested Friday, an official told CBS News. It’s not clear what charges would be filed against her.

06/07/2013

Federal agents raid a home in New Boston, Texas in connection with the investigation into ricin-laced letters sent to Mayor Michael Bloomberg and President Obama on May 31, 2013. (credit: CBS 2)

FBI Raids Home Of Texas Man Considered Person Of Interest In Ricin Investigation

The house is located about an hour and a half drive from Shreveport where ricin-laced letters mailed to Mayor Michael Bloomberg, his gun control group in Washington and a third letter to President Barack Obama were postmarked.

05/31/2013

Mayor Michael Bloomberg (Photo by Mario Tama/Getty Images)/President Barack Obama (Photo by Mark Wilson/Getty Images)

Person Of Interest Questioned In Poison Letter Attacks On Obama, Bloomberg

The Joint Terrorism Task Force expanded its search for the person responsible for sending two poison-laced letters to the mayor and a third to the president as new details emerged about the contents of the threatening notes.

05/30/2013

President Barack Obama (Photo credit: BRENDAN SMIALOWSKI/AFP/Getty Images)

Letter Addressed To President Obama Being Tested For Ricin

The Secret Service has intercepted a letter addressed to President Barack Obama that is similar to two ricin-laced letters that were sent to Mayor Michael Bloomberg and his gun control group in Washington.

05/30/2013

Mayor Michael Bloomberg and Police Commissioner Ray Kelly address the media at city hall on April 16, 2013. (credit: John Moore/Getty Images)

2 Letters Addressed To Mayor Bloomberg Found To Contain Ricin

Threatening letters addressed to Mayor Michael Bloomberg in both New York and Washington, D.C., have been found preliminarily to contain ricin, police said Wednesday.

05/29/2013

President Barack Obama, Sen. Roger Wicker (credit: Getty Images)

Former Miss. House Candidate Arrested In Ricin-Tainted Mailing Case

A onetime Mississippi State House candidate whose home and business were searched as part of an investigation into ricin-tainted letters has been arrested in the case, according to the FBI.

04/27/2013

President Barack Obama, Sen. Roger Wicker (credit: Getty Images)

Elvis Impersonator Accused Of Mailing Ricin-Tainted Letters Released

An Elvis impersonator accused of mailing ricin-laced letters to President Barack Obama and other elected officials was a free man Tuesday night.

04/23/2013

President Barack Obama, Sen. Roger Wicker (credit: Getty Images)

FBI: Tests Show Ricin Was In Letters Mailed To President Obama, Sen. Wicker

The FBI said Thursday that further tests are still being done, but that lab results show the toxin was used in the mailings.

04/18/2013

President Obama Makes Remarks On The Explosions At The Boston Marathon

Ricin Is Found In Letter Sent To President Obama, 1 Arrested

The Secret Service said the second letter was addressed to President Obama. This comes a day after a similar letter was sent to Sen. Roger Wicker of Mississippi.

04/17/2013

Sen. Roger Wicker (credit: Getty Images)

Letter Containing Possible Poison Sent To Republican Sen. Roger Wicker

CBS News reported that the letter preliminarily tested positive for ricin poison, but that further testing is required.

04/16/2013