GRAND RAPIDS, MI – A self-described “monster” used Skype to transmit the sexual assault of a 2-year-old relative over the Internet, the FBI said in criminal complaint.

The complaint accuses Clint Andrews Williamson, 28, of two counts of sexual exploitation of a minor for producing child pornography and one count of distributing child pornography over the Internet.

The documents also detail an investigation into a website dedicated to sharing child pornography, and includes disturbing forums where users discuss topics such as the violent sex assaults of children, killing children, where to find “sexy little kids,” and how to stay out of trouble “in the world of CP.”

FBI special agent Timothy Simon said police in Maryland are investigating the website, which contains an “online bulletin board whose primary purpose was to advertise and distribute child pornography and discuss matters pertinent to the sexual abuse of children.”

He said the website requires installation of computer software so that users have a higher degree of anonymity than regular Internet users. Because of network routing through other computers, traditional tracking of Internet Protocol identification is not viable, he said.

Users cannot use Google to find the site. The specific address is required.

In August, investigators seized the computer server hosting the site and began reviewing its contents. It showed the site had 7,712 members, 22,230 posts and 2,192 topics.

Simon said it took extensive investigation to identify Williamson as a user named, “thefristcatsiam” who once wrote: “...this site is by far my fav hope it stays up for a long time.”

Thefristcatsiam was also registered to at least six other sites known to law enforcement for sharing child pornography, federal court records allege.

Nearly a year ago, Williamson created a topic called, “just some pics I found cleaning my pc,” and said, “hope you like them." The images showed a naked male and a naked young girl, the FBI agent wrote.

Just before Christmas, police used a search warrant at Williamson’s home in Kentwood.

Williamson allegedly admitted he posted child pornography on electronic bulletin boards. He also acknowledged that he transmitted two live videos on Skype using the 2-year-old relative. He showed the girl to a Georgia couple who were naked in their bed, the FBI said.

In a chat with someone else, he allegedly said, “I would love to be able to start a close family from birth raising our kids around sex making it normal for them to see it and be part of it.”

The FBI said Williamson wrote in journals after police raided his home. His wife found them in the car and provided them to the FBI.

“Williamson produced several handwritten journals after the search warrant in which Williamson described himself as a ‘a monster’ and stated that he cannot believe what he has done and that he has done things that he cannot even get himself to write down,” Simon wrote in the complaint.

He said charges are pending against the Georgia couple.

The criminal complaint was unsealed after Williamson's arrest on Wednesday, April 2.

Williamson is held pending a detention hearing on Monday in U.S. District Court in Grand Rapids.

John Agar covers crime for MLive/Grand Rapids Press E-mail John Agar: jagar@mlive.com and follow him on Twitter at twitter.com/ReporterJAgar