CHAPTER SIXJames Maddigan said steadily, “You are being employed to investigate the possibility of alien life forms being here on earth, nothing else.” “All right,” I said. “When—and if—Davis drags down the killer of Shulman, that’ll at least be negative evidence. Right now you think the fact that the killing took place is possible evidence in favor of these, uh, aliens, being present?” He pursed his lips. “Possible evidence. It would seem too much of a coincidence…” I interrupted with, “Listen, there must have been twenty-five persons there last night. Do you actually believe one of them might be a Martian or a Venusian?” Art Roget grinned wryly. “It sounds kind of crazy when you come right out with it like that, doesn’t it?” “Yes,” I said. Maddigan was frowning in irritation. “Of c

