A dangerous terrorist released by Barack Obama is back in action–emerging as one of ISIS’s top recruiters.

Sabir Mahfouz Lahmar, 48, had first been captured by the US in 2001, after a failed plot to blow up the U.S. Embassy in Sarajevo, Bosnia. He was held in Guantanamo Bay until Obama releases him in 2009. Lahmar, an Algerian, was deported to France.

This week, however, he was arrested in Bordeaux by French authorities–having been suspected, along with three other men and two women, of recruiting for ISIS.

Obama made closing the terrorist detention center at Guantanamo Bay a centerpiece of his 2008 campaign–but never followed through. He did, however, substantially reduce the number of prisoners to just 41. That was accomplished by releasing 653 terrorists over his 8 years as President.

Of those 653, more than 30% is confirmed or suspected as having returned to terrorism–including Lahmar.