HOUSTON—A Houston man arrested earlier this year following his social media posts regarding ISIS has been ordered to federal prison following his conviction of being a felon in possession of a firearm, announced U.S. Attorney Kenneth Magidson. Frederick Remon Robinson, 46, pleaded guilty June 3, 2015.

Today, U.S. District Judge Sim Lake ordered he serve 30 months in federal prison to be immediately followed by three years of supervised release.

Robinson was arrested in April 2015 following an investigation launched after he publicly posted several messages on various social media sites such as Twitter. Those posts claimed such comments as “if white people hate ISIS so much, then I like ISIS. The enemy of my enemy is my friend. #chopthemheadsoff Amerikkka is the Black Man’s Foe.” He further tweeted such statements as “I say, don’t hesitate – start shooting in their cars. empty whole clips. find them at home and fire bomb it. anything., do something.”

Robinson also posted pictures of firearms he owned and demonstrated how to load firearms in videos he posted online. Robinson had previously been convicted in Harris County of possession of a controlled substance with the intent to deliver. At the time of his plea, Robinson admitted he possessed a Heckler & Koch, model VP9, 9mm caliber pistol and a Smith & Wesson, model MP-15, .223 caliber rifle. As a convicted felon, he is prohibited from possessing a firearm per federal law.

He will remain in custody pending transfer to a U.S. Bureau of Prisons facility to be determined in the near future.

The charges are the result of an investigation conducted by a joint federal task force that includes the Bureau of Alcohol Tobacco, Firearms and Explosives and the FBI. Assistant U.S. Attorney Alamdar S. Hamdani is prosecuting the case.