(CNN) -- On his website, Ronald William Brown posed with puppets, boasted about birthday party performances and offered workshops for school groups. Now the 57-year-old Florida man is behind bars, facing federal charges of conspiring to kidnap a child and possessing child pornography. Authorities accuse the puppeteer of having graphic discussions online about abusing, kidnapping, killing and eating children, according to court documents. He was arrested in Largo, Florida, last week and appeared in federal court Tuesday. A 29-page criminal complaint filed in federal court includes transcripts of several online chats and details of what investigators found when they searched Brown's home. A CD found in his bedroom dresser's sock drawer included child pornography, images of what appear to be deceased children and a missing-child flier, according to the complaint. Brown told investigators he had discussed kidnapping, killing and eating a boy from his church but said "it was just a fantasy and he could never and would never hurt anyone," the complaint said. Brown maintains he is innocent, attorney Eric Kuske told reporters Tuesday. "It's his contention right now that he didn't do this, he's not involved with this. That there's been some presumptions and assumptions made on what transpired. ... He wouldn't do something like this. He's got no criminal record," Kuske said, according to CNN affiliateWFLA. During a 1998 traffic stop, a sheriff's deputy spotted boys' underwear between front seats in the vehicle Brown was driving, the complaint said.