A northeast Texas woman accused of sending ricin-laced letters to President Barack Obama and New York Mayor Michael Bloomberg is competent to stand trial, a federal judge said Wednesday.

U.S. Magistrate Judge Caroline Craven said Shannon Guess Richardson is mentally competent for a trial during a brief hearing in Texarkana. Richardson also pleaded not guilty to two counts of mailing a threatening communication and one count of making a threat against the president of the United States.

Richardson, an actress from New Boston, Texas, was arrested June 7. She is accused of sending the threatening letters in May to Obama, Bloomberg and a third man who heads Bloomberg’s gun-control group.

A federal affidavit alleges Richardson called authorities to implicate her husband before she was arrested in June.

She was dressed in an olive-green jail jumpsuit and didn’t speak during Wednesday’s hearing, except to talk with her attorney, Tonda Curry. If convicted, Richardson faces up to five years in prison on each charge.

Richardson’s next court hearing is Sept. 11.

(AP)