FBI agent apparently egged on Texas terrorist

Days before an ISIS sympathizer attacked a cartoon contest in Garland, Texas, he received a text from an undercover FBI agent.

“Tear up Texas,” the agent messaged Elton Simpson days before he opened fire at the Draw Muhammad event, according to an affidavit filed in federal court Thursday.

“U know what happened in Paris,” Simpson responded. “So that goes without saying… No need to be direct.”

That revelation comes amidst a national debate about the use of undercover officers and human sources in terrorism cases. Undercover sources are used in more than half of ISIS-related terror cases, according to statistics kept by the George Washington University Program on Extremism, and civil liberties advocates say some of those charged might not have escalated their behavior without those interventions.