“That’s because you’re not in the business of dealing with these things up in Hades,” Fredda said. “But you will be.”
“Well, that sounds very dramatic,” Kresh said, “but all I can see is what looks like some sort of broken-off attachment clip and a torn bit of flat cable.”
“Let me have a look,” Devray said. Kresh stepped back and let the younger man peer into the robot’s interior. “It mean anything to you?” he asked.
Devray pulled his head out, a lot of astonishment on his face. “Burning devils. A restrictor.”
“What?” Kresh said.
“A restrictor. A broken-off connection point for a restrictor. Someone took the restrictors off a batch of New Law robots, modified them somehow to react to a different control system, and plugged them into these SPRs.”
Kresh opened his mouth to speak, but no words came out. The SPRs shut down by restrictors removed from New Law robots? That was diabolical.
Every New Law robot had a restrictor built into it. In principle, at least, the idea was simple enough. The restrictors saw to it that any New Law robot attempting to leave Purgatory would be shut down as it tried to go. It was supposed to be impossible to remove the device without destroying the robot. No restrictor-wearing robot could function outside the area permitted by the restrictor-which was to say, the island of Purgatory. The precise workings of the system were a closely held secret. Even Kresh did not know exactly how it was supposed to work.
But he did know the operative word was “supposed,” for the obvious fact was that the system did not work. Every rustback robot that left the island was a testament to that. That there was a traffic in them, a regular business, and that made it plain that it was not a question of occasional lapses or isolated violations. Rustbacking was more than just a business-it was a whole criminal industry, a highly sophisticated operation.
And one that was now tied into the assassination of the Governor. A gang of rustbackers hand found a way to tamper with the Governor’s own security robots. How the hell could they trace that leak?
“You’re sure that’s a piece off a New Law robot’s restrictor?” Kresh demanded.
“Absolutely,” said Fredda Leving. “It was what I was looking for when I started checking the Sapper robots.”
“But I don’t understand. We’re still on the island. Why should restrictors turn off the security robots?”
“They must have been modified in some way, “ Fredda said. “Clearly they weren’t working on a geographic basis, because the Sappers were working fine during the party. My guess is that they were modified to deactivate the robots on some sort of signal. Hyperwave, or maybe even old-fashioned radio. No one uses radio anymore-but that fact right there would make it perfect for this sort of job. The signal would be undetectable with any sort of modern equipment. Clearly the restrictors have been modified not only to shut down the robots in some different way, but also to be removable in a hurry. Except this restrictor didn’t come out quite as easily as it was supposed to.”
“But where the devil did they get the restrictors to put on the SPRs?” asked Devray.
There were times it was more than clear to Kresh that Devray did not think in terms of crime and victim and criminal. He was better suited to forest management than murder investigation.
“The spare parts bin,” Leving said. “Obviously, they used restrictors they had peeled off New Law robots. Rustbackers did this. No one else could have.”
“Well, one thing is for sure,” Kresh said. “Whoever did this worked in a rustbacker lab at some point. He or she knew how to get these things out, and do it in a hurry.”
“A rustbacker,” Fredda said. “Maybe that can point us toward a motive for the murder.”
“Maybe,” Alvar said. “At least now we can get started.”
Donald 111 was in a very slight state of shock, and it was with a great sense of relief that he found that his duties required him to be alone.
The SPRs had been tampered with. They had been shut down, useless for security work. Kresh had comforted him with the knowledge that Grieg had died with fifty robots to protect him. One more could have done no good. But the fifty had been useless, meaningless. One functioning robot could easily have made the difference. Worse, it was the deployment of the SPRs that had doomed Grieg-and Donald had urged their deployment.
Robots on the planet Inferno had always been built with extremely high First Law, and had been known to freeze up on occasions such as this, when they learned they could have prevented harm to a human. But Donald knew better than that. Yes, he could have saved Governor Grieg-if he had been possessed of information known to no one but those who killed the Governor. He could have saved him-if he had been here, at the Residence, instead of many kilometers away, with Kresh, performing his normal duties. He could have saved the Governor if a half-dozen impossible things had happened.
