"What's that," I said. "Is that it?" What I was looking at was a large plastic soft drink bottle, painted black, lying on its side with a hole visible in the bottom.

"A disposable silencer. Handmade. A sound suppressor, in effect. It's been wiped clean of prints," Jonah said.

"I don't understand how it works."

"I had to have Krueger explain it to me. The bottle's filled with rags. Take a look. The barrel of the gun is usually wrapped with tape and the bottle affixed to it with a one-inch hose clamp. The soda bottle has a reinforced bottom, but it's only effective for a few shots because the noise level increases each time as the exit hole gets larger. Obviously, the device works best at close range."

"God, Jonah. How do people know about these things? I never heard of it."

He picked up a paperbound booklet from the counter behind me, flipping through it carelessly so I could see. Every page was filled with diagrams and photographs, illustrating how disposable silencers could be made out of common household objects. "This is from a gun shop down in Los Angeles," he said. "You ought to see what you can do with a length of window screen or a pile of old bottle caps."

"Jesus."

Lieutenant Becker stuck his head in the door. "Line one for you," he said to Jonah and then disappeared. Jonah glanced at the lab phone, but the call hadn't been transferred.

"Let me take this and I'll be right back," Jonah said. "Hang on."

"Right," I murmured. I leaned toward the silencer, trying to remember where I'd seen something similar. Through the hole in the bottom, I caught a glimpse of the blue terrycloth filling the interior. When I realized what it was, my mental process clicked in, and the interior machinery fired up. I knew.

I straightened up and crossed to the door, checking the corridor, which was empty. I headed for my car. I could still see Ramona Westfall coming up the basement stairs with an armload of ragged blue bath towels, which she'd dumped on the chair. The plastic bottle had been filled with a soft drink which she nearly dropped as she passed it to Tony to refrigerate.

I stopped by the office long enough to try the Westfall's number. The phone rang four times and then the machine clicked in.

"Hello. This is Ramona Westfall. Neither Ferrin nor I can come to the phone right now, but if you'll leave your name, telephone number, and a brief message, we'll get back to you as soon as possible. Thank you." I hung up at the sound of the tone.

I checked my watch. It was 4:45. I had no idea where Ramona was, but Tony had a 5:00 appointment just a few blocks away. If I could intercept him, I could lean on him some about her alibi since he represented the only confirmation she had. How had she pulled it off? He had to be on heavy medication for the migraine, so she might have slipped out while he was sleeping, adjusting the kitchen clock when she got back so she'd be covered for the time of Daggett's death. Once she was home again, Tony had wakened-she'd probably made sure of that so she'd have someone to corroborate the time. She'd fixed the sandwiches, chatting pleasantly while he ate, and as soon as he went back to bed, she changed the clock again. Or maybe it wasn't even as complicated as that. Maybe the watch Daggett wore had been set for 2:37 and then submerged. She could have killed him earlier and been home by 2:00. Tony may have realized what she'd done and tried to shield her when he understood how close my investigation was bringing me. It was also possible that he was in cahoots with her, but I hoped that wasn't the case.

I locked my office and went down the front stairs, trotting up State Street on foot. The Granger Building was only three blocks up and it made more sense than hopping in my car and driving all the way around to the parking lot behind the building. Tony might still be hanging out at the arcade across the street. I had to get him before she had a chance to intercept. I didn't want him going home. She had to realize things were getting hot, especially since I'd shown up at the house with the shoes and skirt. All I needed from him was an indication I was on the right track and then I'd call Feldman. I thought about the Close, which I knew would be gloomy with the gathering twilight. I didn't want to go back there unless I had to.

I checked the arcade. Tony was at the rear, on the right-hand side, playing a video game. He was concentrating fully and I didn't think he was aware of me. I waited, watching small creatures being blasted off the screen. His scores weren't that good and I was tempted to have a try at it myself. The creatures suddenly froze into place, random weapons firing off here and there without regard to his manipulations. He looked up. "Oh hi."

"I need to talk to you," I said. His eyes moved to the clock. "I got an appointment in five minutes. Can it wait?"

"I'll walk you over. We can talk on the way." He picked up his package and we moved out to the street. The fading afternoon sun seemed bright after the darkness of the arcade. Even so, the fog was rolling in, November twilight beginning to descend. I punched the button at the crosswalk and we waited for the light to change. "Last Friday… the night Daggett died, do you remember where your uncle was?" "Sure. Milwaukee, on a business trip." "Are you on medication for the migraines?" "Well, yeah. Tylenol with codeine. Compazine if I'm throwing up. How come?"

"Is it possible your aunt went out while you slept?"

"No. I don't know. I don't understand what you're getting at," he said.

I thought he was stalling, but I kept my mouth shut. We'd reached the Granger Building and Tony moved into the lobby ahead of me.

The elevator that had been out of order was now in operation, but the other one was immobilized, doors open, the housing visible, two sawhorses in front of the opening with a warning sign.

Tony was watching me warily. "Did she say she went out?"

"She claims she was home with you."

"So?"

"Come on, Tony. You're the only alibi she has. If you were zonked on medication, how do you know where she was?"

He pressed the elevator button.

The doors opened and we got on. The doors closed without incident and we went up to six. I checked his face as we stepped into the hallway. He was clearly conflicted, but I didn't want to press just yet. We headed down the corridor toward the suite his psychiatrist apparently occupied.

"Is there anything you want to talk about?" I asked.

"No," he said, his voice breaking with indignation. "You're crazy if you think she had anything to do with it."

"Maybe you can explain that to Feldman. He's in charge of the case."

"I'm not talking to the cops about her," Tony said. He tried the office door and found it locked. "Shit, he's not here."

There was a note taped to the door. He reached up to snatch the piece of paper, turning the movement into an abrupt shove. Next thing I knew, I was on my hands and knees and he'd taken off. He banged on the elevator button and then veered right. I was up and running when I heard the door leading to the stairway slam back against the wall. I ran, banging into the stairwell only seconds after he did. He was already heading up.

"Tony! Come on. Don't do this."

He was moving fast, his footsteps scratching on the concrete stairs. His labored breathing echoed against the walls as he went up. I don't keep fit for nothin', folks. He had youth on me, but I was in good shape. I flung my bag aside and grabbed the rail, starting up after him, mounting the steps two at a time. I peered upward as I ran, trying to catch sight of him. He reached the seventh floor and kept on going. How many floors did this building have?

"Tony. Goddamn it! Wait up! What are you doing?"

I heard another door bang up there. I stepped up my pace.