Hal Neilson, an attorney for Curtis, said the defense gave authorities a list of people who may have had a reason to hurt Curtis.
"Dutschke came up," he said. "They (prosecutors) took it and ran with it. I could not tell you if he's the man or he's not the man, but there was something there they wanted to look into."
An FBI intelligence bulletin obtained by the AP said the two ricin-laced letters addressed to Obama and Wicker said: "To see a wrong and not expose it, is to become a silent partner to its continuance." Both were signed, "I am KC and I approve this message."
Curtis was already well known to Wicker because he had written to the Republican senator and other officials. Curtis also wrote a novel called "Missing Pieces," about black-market body parts he claimed to have found while working at a hospital — a claim the hospital says is untrue. Curtis posted similar language on his Facebook page and elsewhere. The documents indicate Curtis had been distrustful of the government for years. He told the AP on Tuesday that he realizes his writings made him an easy target.
Multiple online posts under the name Kevin Curtis on various websites that could be seen by anyone refer to the conspiracy he claimed to uncover when working at a local hospital from 1998 to 2000. In one post, Curtis said he sent letters to Wicker and other politicians. He signed off: "This is Kevin Curtis & I approve this message."
Christi McCoy, another attorney for Curtis, said she doesn't know what new information prosecutors have, but said the plot to frame her client was "very, very diabolical."
Curtis, dressed after his release Tuesday in a black suit, red shirt, necktie and sunglasses, said he met Dutschke in 2005 but that for some reason Dutschke "hated" and "stalked" him. "To this day I have no clue of why he hates me."