The NY Times reports here and here that the Jordanian militant who killed numerous CIA and Jordanian intelligence operatives was considered by the CIA to be one of its most promising informants. From the Times:
American intelligence officials said Tuesday they had been so hopeful about what the Jordanian might deliver during a meeting with C.I.A. officials last Wednesday at a remote base in Khost that top officials at the agency and the White House had been informed that the gathering would take place.
Instead, the discovery that the man, Humam Khalil Abu-Mulal al-Balawi, also known as Humam Khalil Mohammed, was a double agent and the killing of seven C.I.A. operatives in the blast were major setbacks to a spy agency that has struggled to gather even the most ephemeral intelligence about the whereabouts of Osama bin Laden.
Terrorism informants represent the most extreme version of the snitching gamble: the government’s hope that working with criminal insiders will produce more benefits than are lost by tolerating the informant’s own criminal activities. In the terrorism arena, the gamble appears especially necessary. As the Times points out, few criticized the agency’s impulse to chase any credible lead about the locations of Al Qaeda’s top leaders. “This is the C.I.A’s top priority, and when I was in Afghanistan, if any intelligence came about the possible whereabouts of Zawahri or bin Laden, you dropped everything to run it to ground,” said a former senior C.I.A. officer. “Everyone would have wanted to be on the team that caught Zawahri. That’s the kind of thing that makes careers.”