The criminal charges continue to mount against a Texas man who had described himself as a spokesman for the hacker-activist group Anonymous.

A two-count federal indictment returned Thursday in Dallas charges Barrett Brown with concealing evidence by hiding two laptop computers from authorities.

The 31-year-old defendant was a de facto spokesman for Anonymous, willing to speak for a movement that prides itself on anonymity.

The latest indictment alleges that he concealed the laptops from authorities at the home of an associated identified only as "KM." The indictment doesn't detail what was on the laptops. He already is accused of stealing data from the Austin-based private intelligence firm Stratfor and threatening an FBI agent on the Internet.

Brown's attorney, Doug Morris, declined to comment on the new charges.