A Florida man pleaded guilty today to attempting to provide material support and resources to the Islamic State of Iraq and al-Sham, also known as ISIS, a designated foreign terrorist organization since 2014.

According to court documents, Romeo Xavier Langhorne, 31, of St. Augustine, pledged his allegiance to ISIS at some point in 2014, knowing that ISIS was a designated foreign terrorist organization and that they engaged in acts of terrorism.

If convicted, Langhorne faces a maximum of 20 years in federal prison. A federal district court judge will determine any sentence after considering the U.S. Sentencing Guidelines and other statutory factors.

Throughout 2018 and 2019, Langhorne reaffirmed his support for ISIS on various social media accounts, as well as posted ISIS-produced videos to his YouTube account and participated in online chat rooms with like-minded individuals. In December 2018 and January 2019, Langhorne expressed in one of those chat rooms an interest in creating a video that would improve on existing videos demonstrating the making and use of a deadly explosive – triacetone triperoxide, also known as TATP.

Read more: Department of Justice