TUPELO, Miss. (WTVA)-- A north Mississippi man at the center of a national investigation faces federal charges for mailing letters to President Obama and Senator Roger Wicker containing a deadly substance called ricin.
Officials arrested Paul Kevin Curtis Thursday at his home in Corinth.
Today questions remain about possible motives.
For years Paul Kevin Curtis took to many stages impersonating the king of Rock and roll, Elvis.
In video captured during a performance at WTVA's studio, Curtis performed on the Kay Bain's Morning Show.
Now federal authorities say they intercepted two letters from Curtis--one sent to the president and the other to Senator Roger Wicker--both letters tested positive for the toxic substance ricin.
Authorities are still unsure of Curtis' motives, but his writings indicate a man that's troubled.
In a complaint Curtis posted years ago on a consumer complaint website, the Rip off Report, Curtis' complaint started with questioning about a refrigerator packed with body parts, to mistreatment of illegal immigrants, to being wrongfully terminated.
He said he sent letters to politicians, including Roger Wicker, and says he never got a response.
In a recent Facebook post he closed with the same statement "This is Kevin Curtis and I approve this report", a phrase that authorities used to locate him.
Officials said they arrested Curtis at his Corinth home Thursday without incident. While Curtis has not said anything to the media, through his attorney, he said he is innocent.