Sugar Land Resident Sentenced to Federal Prison for ISIS Related Conviction

Warren Christopher Clark, a 34-year-old resident of Sugar Land, has been sentenced to federal prison for his involvement with the Islamic State of Iraq and al-Sham (ISIS), as announced by U.S. Attorney Alamdar S. Hamdani.

Clark, who pleaded guilty on October 10, 2023, has been ordered by U.S. District Judge George C. Hanks Jr. to serve 120 months in federal prison, followed by a lifetime of supervised release. The court imposed a terrorism enhancement, emphasizing that Clark’s actions betrayed the values of the country.

Special Agent in Charge Douglas Williams of the FBI Houston field office remarked, “By seeking and receiving military training from a foreign terrorist organization, Clark, a former teacher, betrayed his nation and allied himself with one of the most violent U.S. adversaries.”

Clark admitted knowing that ISIS was a foreign terrorist organization. He illegally traveled from Turkey into Syria, where he underwent mandatory religious and military training. Correspondence with his family revealed his allegiance to ISIS, stating he would not return to the United States unless “the Islamic State conquers the US.”

Clark renounced his U.S. citizenship and declared himself a citizen of the Islamic State. He will remain in custody pending transfer to a U.S. Bureau of Prisons facility.

“In the interests of national security, our laws prohibit Americans from receiving military training from designated foreign terrorist organizations. Warren Clark ran afoul of those laws when he illegally crossed the border into Syria and underwent military training from ISIS, a brutal terrorist organization,” said Hamdani. “Thanks to international partnerships, Clark was brought back to the United States to face the consequences for his crimes in a Southern District of Texas courtroom.”

The FBI Joint Terrorism Task Force and police departments in Houston and Sugar Land conducted the investigation.