He was in Syria? We all know what Senator was to visit friends and Syria.
Capture
Zammar was released as part of a prisoner exchange between the Islamist Syrian rebel group Ahrar al-Sham and the Syrian Government in September 2013.[7] A member of the negotiating team told Der Spiegel that days after being released, Zammar travelled to the Syrian city of Raqqa and joined the Islamic State of Iraq and the Levant (ISIL). He reportedly organised for funds to be sent to the Sinai-based militant group Ansar Bayt al-Maqdis, and negotiated for the group to swear allegiance to ISIL.[8]
Recapture
Zammar was allegedly recaptured by members of the Kurdish People's Protection Units around the 18th of April, 2018. Reports claim that he is currently being held in a prison in the North of Syria, and his current fate remains unclear.[9]