"How could a guy do that?" Arctor said. "Pose as a nark?"

"What?" both Barris and Luckman said together.

"Shit, I'm spaced," Arctor said, grinning. "'Pose as a nark' - wow." He shook his head, grimacing now.

Staring at him, Luckman said, "POSE AS A NARK? POSE AS A NARK?"