There wasn't enough information in the tipsters information to be actionable.
"The FBI special agent in charge of the Miami division, Robert Lasky, confirmed Thursday morning that the bureau received a tip last year about the YouTube comment.
"No other information was included with that comment which would indicate a time, location or the true identity of the person who made the comment," Lasky said during a news conference. "The FBI conducted database reviews, checks but was unable to further identify the person who actually made the comment."