Mr Rizieq arriving at the Jakarta police headquarters on Jan 23.
The Islamic Defenders' Front chairman had been jailed twice previously - in 2003 for inciting his followers to violently harass people at nightspots in Jakarta, and in 2008 for attacking a minority group holding a vigil in the capital.
But the experts will first have to prove whether the materials and exchanges are fake or real," Senior Commissioner Argo said.
The case is the latest in a string of accusations lodged to the police against the chairman of hardline group Islamic Defenders' Front (FPI), from blasphemy to hate speech to insulting state symbols.
Velez is being held in the Fort Bend County jail on bonds totaling 0,000, according to a spokesman with the Fort Bend County Sheriff's office.
Velez faces four charges dealing with sexual assault of a child and child pornography.
The relatively new crime of webcam sex tourism is spreading rapidly, with new digital technologies sparking what the United Nations calls an “alarming growth of new forms of child sexual exploitation online.” The FBI says it’s epidemic, and that at any given moment, 750,000 child predators are online.
But Lisa Weiss, a 40-year-old blackjack dealer, who said she had exchanged 220 messages with Mr Weiner since contacting him on Facebook in August last year, claimed this was not the case.
"I gave him my number and he called me from his office and we proceeded to talk dirty for at least 30 minutes," she told Radar Online.
Those involved in the production or dissemination of the materials can be charged with violating the country's anti-pornography as well as Information and Electronic Transaction laws, he added.
"Investigators are now examining the content and materials of the people featured and will question them later.