The family of a Mississippi man charged with sending ricin-laced letters to the President says he struggles with mental illness.
Paul LKevin Curtis, 45, was arrested in Corinth, Mississippi on Wednesday.
He's expected to appear again in federal court on Friday.
His attorney said he was innocent during a brief appearance Thursday.
Authorities say three letters sent through the U.S. postal service preliminarily tested positive for the toxin ricin.
The letters were postmarked from Memphis, Tennessee.