Painter snorted angrily. “That’s a likely story. Got any proof?”

“Rourke will verify it. He was invaluable in chauffeuring her around. Any time any of you gentlemen wish to dispose of a corpse I can recommend Tim.”

Rourke shuddered and swore explosively. Shayne silenced him with sudden gravity of words and expression. “I’ve got to tell all this, Tim. It’s an important part of my case.”

He turned back to the roomful of listening men. “Well, there you are. A girl comes to my apartment to talk, but is too full of dope to talk when she gets there. I hide her in my bedroom to keep my wife from seeing her. I rush my wife to the depot and when I return the girl has been strangled in my bed. I leave my apartment for a short time and when I return the body has been snatched. Later a wreck is staged to shove her back onto me — without pants. Do you begin to see any logic behind those reasonless acts of the killer?” Shayne paused. “This next, without the rest of the case, might not mean as much as I think it does. Maybe”—his grin was less than convincing—“maybe some of you know more than I do about what the modern gals are wearing. Want to qualify as an expert, Painter?” He didn’t wait for a reply, but went on swiftly. “According to me, anyhow, most nice girls wear pants when they go out on the street — and lipstick and rouge and nail color. Why, even the gal found floating in the bay last night with nothing else on wore pants and a brassiere. Rut if you’ll look at the police report on the discovery of Helen Stallings’s body this morning you’ll see that she wore neither, only a silk dress. But Helen was a nice girl by all accepted standards. There’s only one explanation. She had been some place where even nice girls don’t wear underthings. A hospital, maybe. A sanitarium like yours, Doctor Patterson. None of your patients wear anything under those Mother Hubbards you put on them and none of them have any facilities for prettying up.”

Dr. Patterson opened his mouth to protest.

“I’m doing the talking,” Shayne interrupted savagely. “The girl who came to my office yesterday afternoon too doped to do any talking was wearing a blue silk dress, and, I’m convinced, the conventional silk things underneath. Not that I made a personal examination, you understand. She looked like that sort of girl. Also, I don’t recall noticing particularly that she wasn’t wearing the normal amount of make-up and nail polish, which indicates she probably was. Nowadays, one notices the absence of such things, but not their presence. Later, Helen Stallings appears on the scene, choked to death but indecently nude underneath. What happened to the pants and brassiere in the meantime?

“I’ll tell you. They’re on the body of the girl found floating in the bay, the one whose head and face were battered beyond recognition to hide the damning fact that her death was actually due to strangulation. That’s the girl who was throttled in my office — the one who called herself Helen Stallings.”

A babble of incredulous protests and questions arose when Shayne paused. He turned to Painter. “Get the autopsy report on that girl and you’ll see I’m right. The head wounds were inflicted after she was strangled.”

“I still don’t see any sense to what you’re saying,” Peter Painter bubbled. “You admit the dead girl is actually Helen Stallings—”

“Sure. The body that was dumped back on me after the wreck. The murderer switched bodies in the meantime. He put the blue dress on Helen Stallings and threw the other body in the bay. After committing the first murder he had to go on with it and kill Helen, too. He went to Patterson’s Sanitarium where she has been kept in a padded inner cell ever since the switch was made a month ago and hung her by the neck so the same marks of strangulation would show and I’d think it the girl who was killed in my office. The girls were of the same type and build, of course. Then he took the body away, naked except for the single garment they wear there, dressed her in the blue dress he had stripped from his first victim, and engineered the crash with my car to get her back in my possession, hoping she would be found at the scene of the crash.