DALLAS -- A Dallas activist linked to online hackers is expected to plead guilty to reduced charges in connection with a case that's gotten the attention of journalism and Internet advocates.

Barrett Lancaster Brown is due in federal court in Dallas on Tuesday.

Brown was arrested two years ago after posting YouTube videos and tweets threatening to investigate an FBI agent. He was then indicted for sharing links to information stolen from an Austin-based company by hackers linked to the collective Anonymous.

Court documents indicate he will admit to obstructing the execution of a search warrant, making Internet threats and being an accessory to an unauthorized access of a protected computer.

Prosecutors have dismissed several charges that raised the ire of free-speech advocates.

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