The death of Jiro’s wife had affected the young decker radically. His behavior had become erratic, leaving him surly and solitary where he once had been open and sociable. Renraku Corporation had reacted to the change, solicitous of its employees’ welfare. When Sam reported the addition the young decker had made to his Matrix icon, the company psychiatrist agreed that monitoring was a reasonable precaution. The physician had authorized company software experts to write and emplace a custom watchdog program that would allow another decker to follow Jiro as he moved through the Matrix. Hardware modifications and custom software embedded in Jiro’s cyberterminal workstation made the watcher invisible to the senses of Jiro’s icon.