Barrett Brown pleaded guilty on Tuesday in a Dallas federal court to posting an online threat aimed at a federal agent.
The writer and activist was arrested in 2012 after posting a video on YouTube in which he threatened an FBI agent who was tasked with investigating him.
In addition to that plea, he also pleaded guilty to charges of obstructing the execution of a search warrant, as well as being an accessory to an unauthorized access of a protected computer, according to an Associated Press report.
In March federal prosecutors moved to dismiss a majority of the criminal charges previously filed against Brown related to sharing a link to a dump of credit card numbers connected to the breach of intelligence firm Stratfor. Following this plea, he now faces up to eight-and-a-half years in prison.