As a US Citizen, the US would have been the negotiating party. The US policy on this is clear. The only exclusion to this clear US policy is when a US citizen is working on behalf of a foreign military force. Then US citizens are on their own. Since truths like this can never make it through Israeli censorship, this is mostly just to let you censors know that WE in the United States know he was one of your agents. We aren't stupid over here.....
Mexico: Death toll 27 after truck hits religious procession (AP)
from the article: Israel begins transferring Egyptian prisoners ahead of Grapel swap