Yes. Several months ago, the U.S. released the pictures of 6-7 people that they asked Americans to watch out for. Adam Pearlman was one of those men.
Thanks. I thought he looked familiar.
This guy, Adnan G. El Shukrijumah, was spotted in Sonora, Mexico in August by a number of witnesses following a Mexican TV show on terrorism.
If you Google "Shukrijumah sonora" you'll find a number of stories on it.