“To swear to,” Purley told him, “damn little. But putting it all together from what we’ve collected, this is how it looks, and I’ll have to be shown different. When Kampf and the dog entered it was raining and the dog was wet. Kampf left the dog in the ground-floor hall. He removed the leash and had it in his hand when he went to the door of one of the apartments. The tenant of the apartment let him in, and they talked. The tenant socked him, probably from behind without warning, and used the leash to finish him. He stuffed the leash in the pocket of the raincoat. It took nerve and muscle both to carry the body out and down the stairs to the lower hall, but he damn well had to get it out of his place and away from his door, and any of those four could have done it in a pinch, and it sure was a pinch. Of course the dog was already outside, out on the sidewalk. While Kampf was in one of the apartments getting killed, Talento had come into the lower hall and seen the dog and chased it out.”

“Then,” Loftus objected, “Talento’s clean.”

“No. Nobody’s clean. If it was Talento, after he killed Kampf he went out to the hall and put the dog out in the vestibule, went back in his apartment and carried the body out and dumped it at the foot of the stairs, and then left the house, chasing the dog on out to the sidewalk. You’re the dog expert. Is there anything wrong with that?”

“Not necessarily. It depends on the dog and how close he was to Kampf. There wasn’t any blood.”

“Then that’s how I’m buying it. If you want it filled in you can spend the rest of the day with the reports of the other experts and the statements of the tenants.”

“Some other day. That’ll do for now. You’re going in first?”

“Yeah. Come on, Goodwin.”

Purley started for the door, but I objected. “I’m staying with the dog.”

“For God’s sake. Then keep behind Loftus.”

I changed my mind. It would be interesting to watch the experiment, and from behind Loftus the view wouldn’t be good. So I went into the vestibule with Purley. The inner door was opened by a Homicide colleague, and we crossed the threshold and moved to the far side of the small lobby, which was fairly clean but not ornate. The colleague closed the door and stayed there. In a minute he pulled it open again, and Loftus and the dog entered. Two steps in, Loftus stopped, and so did the dog. No one spoke. The leash hung limp. Bootsy looked around at Loftus. Loftus bent over and untied the cord from the collar, and held it up to show Bootsy he was free. Bootsy came over to me and stood, his head up, wagging his tail.