This from the Florida Sun-Sentinel from last night:

Accused airport shooter Esteban Santiago told investigators after his arrest that he communicated with Islamic State terrorists or sympathizers in “jihadi chat rooms” before he killed five people in Fort Lauderdale, authorities said in court Tuesday.

Whether that’s true is not clear. Prosecutors and agents are still combing through electronic devices Santiago may have used, looking for evidence to show whether he was radicalized and whether he actually visited those terrorist chat rooms and websites, law enforcement sources said.