"I thought you'd managed to get that blabbermouth transposed to PolTerm," Zostha said.
"He wouldn't go." Tortha Karf replied. "Said it was just a trick to get him off Home Time Line during the Council crisis."
Yandar Yadd had appeared on the screen as the pickup swung about.
"... Recording ostensibly made by Councilman Salgath on Police Terminal Time Line, and telecast on Home Time Line an hour ago. Well, I don't know who he was, but I now have positive proof that he definitely was not Salgath Trod!"
"We're sunk!" Zostha Olv grunted. "He'd never make a statement like that unless he could prove it."
"... Something suspicious about the whole thing, from the beginning," the newsman was saying. "So I checked. If you recall, the actor impersonating Salgath gestured rather freely with his hands, in imitation of a well-known mannerism of the real Salgath Trod; at one point, the ball of his right thumb was presented directly to the pickup. Here's a still of that scene."
He stepped aside, revealing a viewscreen behind him; when he pressed a button, the screen lighted; on it was a stationary picture of Kostran Galth as Salgath Trod, his right hand raised in front of him.
"Now watch this. I'm going to step up the magnification, slowly, so that you can be sure there's no substitution. Camera a little closer, Trath!"
The screen in the background seemed to advance, until it filled the entire screen. Yandar Yadd was still talking, out of the picture; a metal-tipped pointer came into the picture, touching the right thumb, which grew larger and larger until it was the only thing visible.
"Now here," Yandar Yadd's voice continued. "Any of you who are familiar with the ancient science of dactyloscopy will recognize this thumb as having the ridge-pattern known as a 'twin loop.' Even with the high degree of magnification possible with the microgrid screen, we can't bring out the individual ridges, but the pattern is unmistakable. I ask you to memorize that image, while I show you another right thumb print, this time a certified photo-copy of the thumb print of the real Salgath Trod." The magnification was reduced a little, a card was moved into the picture, and it was stepped up again. "See, this thumb print is of the type known as a 'tented arch.' Observe the difference."