One example Wednesday was a group of four men, found in their house by the LAR Raider Platoon during a search. They said they had recently been caught by the mujahideen, or holy warriors of the resistance, and been tortured.
Later that day and several blocks away, Raider Scouts searching other buildings found four more men. They also said they stayed behind to guards their houses, and that they had been tortured.
But further questioning found that there were no signs of torture - militants in Fallujah typically kill suspected traitors - and that the men's claimed identities did not hold up to investigation.
"It was well rehearsed," said Lt. Michael Aubry from Arlington Heights, Ill. "The first time didn't look suspicious, but the second time ... it did."
"There are sleeper cells all over the place," says Juarez. New rebel tactics emerge in Fallujah | csmonitor.com