Actress Shannon Richardson arrested for mailing Ricin to President Obama

Actress Shannon Richardson has been arrested and charged for allegedly sending ricin-tainted letters to President Barack Obama and New York Mayor Michael Bloomberg, a law enforcement official has confirmed.
The 36-year-old has appeared in small television roles on "The Vampire Diaries"
and "The Walking Dead," according to her iMDb page.

Richardson is charged with mailing a threatening communication to the President of the United States, the U.S. Attorney's office said in a statement. According to the arrest affidavit, on May 20, 2013, Richardson is alleged to have actually mailed three letters containing the toxin ricin. The letters were sent to President Barack Obama and Mark Glaze in Washington, D.C., and Mayor Michael Bloomberg in New York City. Richardson was arrested today in Mt. Pleasant, Texas, and appeared before Judge Craven this afternoon in Texarkana, Texas, for an initial appearance.
FBI agents wearing hazardous material suits were seen going in and out of her house Wednesday in New Boston, about 150 miles northeast of Dallas near the Oklahoma and Arkansas borders, according to the 
Associate Press.

Richardson, who is reportedly pregnant, originally called the FBI to implicate her husband, Nathaniel Richardson, in the crimes.

Whats her problem?