"Ah."

"I see that reaction. But in the clock collecting world, one man's tacky is another man's art." He smiled. The caution and concern weren't gone but Hallerstein was slightly less defensive.

She frowned. "At noon what do you do? Wear earplugs?"

A laugh. "Most of them, you can shut the chimes off. The cuckoos're the ones that drive me crazy. So to speak."

She asked a few more questions about his business, filing away a library of gestures and glances and tones and words-establishing the baseline for his behavior.

Finally, keeping her tone conversational, she asked, "Sir, we'd like to know: Did someone recently buy two clocks like this one?" She showed him the picture of one of the Arnold Products clocks left at the crime scenes. Her eyes scanned him as he stared at the photo, his face neutral. She decided he was studying it for too long, an indication that his mind was engaged in a debate.

"Can't say I recall. I sell a lot of clocks, believe me."

Faulty memory-a flag for the stress state of denial in a deceptive person, just like Ari Cobb earlier. His eyes scanned the photo again carefully, as if trying to be helpful, but his shoulder turned toward her slightly, his head dipped and his voice rose in pitch. "No, I really don't think so. Sorry, I can't help."

She sensed he was deceptive, not only from the kinesics but his recognition response (in his case, the neutral visage, which deviated from his expressive baseline); most likely he knew the clock. But was he deceptive because he simply didn't want to get involved, or because he sold clocks to someone he thought might be a criminal, or because he was involved in the killings himself?

Hands clasped in front of her, or purse on the counter?

In determining personality type, Dance had categorized the reluctant witness earlier, Cobb, as an extrovert; Hallerstein was the opposite, an introvert, someone who makes decisions based on intuition and emotion. She drew this conclusion about the dealer because of his clear passion for his clocks and the fact he was only a moderately successful businessman (he'd rather sell what he loved than run a mass-market operation and make more profit).

To get an introvert to tell the truth, she'd have to bond with him, make him feel comfortable. An attack like the one on Cobb would make Hallerstein freeze up instantly.

Dance sighed, her shoulders slumping. "You were our last hope." She sighed, glancing at Sellitto, who, bless him, gave a good portrayal of a disappointed cop, shaking his head with a grimace.

"Hope?" Hallerstein asked.

"The man who bought these clocks committed a very serious crime. They're the only real leads we have."

The concern that blossomed in Hallerstein's face seemed genuine but Kathryn Dance had met a lot of good actors. She put the paper back into her purse. "Those clocks were found next to his murder victims."

Eyes frozen for a moment. This is one stressed-out shopkeeper we've got ourselves here.

"Murder?"

"That's right. Two people were killed last night. The clocks might've been left as messages of some kind. We're not sure." Dance frowned. "The whole thing is pretty confusing. If I were going to murder someone and leave a message I wouldn't hide it thirty feet away from the victim. I'd leave it a lot closer and out in the open. So we just don't know."

Dance watched his reaction carefully. To her calculated misstatement, Hallerstein gave the same response as would anyone unfamiliar with the situation, a shake of the head at the tragedy but no other reaction. Had he been the killer, he would most likely have given a recognition response-usually centering around the eyes and nose-that her words didn't coincide with his knowledge of the facts. He would've thought: But the killer did leave it by the body; why would somebody move it? And that thought would have been accompanied by very specific gestures and body language.

A good deceiver can minimize a recognition response so that most people aren't aware of it but Dance's radar was operating at full strength and she believed the dealer passed the test. She was convinced he hadn't been at the crime scenes or knew the Watchmaker.

She put her purse on the counter.

Lon Sellitto moved his hand away from his hip, where it had been resting.

But her job had just begun. They'd established that the dealer wasn't the killer and didn't know him, but he definitely had information.

"Mr. Hallerstein, the people who were killed died in very unpleasant ways."

"Wait, they were on the news, right? A man was crushed? And then somebody was thrown into the river."

"Right."

"And…that clock was there?"

Almost "my" clock. But not quite.

Play the fish carefully, she told herself.

She nodded. "We think he's going to hurt somebody again. And like I said, you were our last hope. If we have to track down other dealers who might've sold the killer the clocks it could take weeks."

Hallerstein's face clouded.

Dismay is easily recognized in a person's face but it can arise in response to many different emotions-sympathy, pain, disappointment, sorrow, embarrassment-and only kinesics can reveal the source if the subject doesn't volunteer the information. Kathryn Dance now examined the man's eyes, his fingers caressing the clock in front of him, his tongue touching the corner of his lips. Suddenly she understood: Hallerstein was displaying the flight-or-fight response.

He was afraid-for his own safety.

Got it.

"Mr. Hallerstein, if you could remember anything to help us, we'd guarantee you were safe."

A glance at Sellitto, who nodded. "Oh, you bet. We'll put an officer outside your shop if we need to."

The unhappy man toyed with a tiny screwdriver.

Dance took the picture out of her purse again. "Could you just take another look? See if you can remember anything."

But he didn't need to look. His posture caved in slightly, chest receding, head forward. Hallerstein sprinted into the acceptance response state. "I'm sorry. I lied."

Which you hardly ever heard. She'd given him the chance to claim that he'd looked at the picture too fast or was confused. But he didn't care about that. Do not pass go-it was confession time, pure and simple.

"I knew the clock right away. The thing is, though, he said if I told anybody, he'd come back, he'd hurt me, he'd destroy all my watches and clocks, my whole collection! But I didn't know anything about any murder. I swear! I thought he was a crank." His jaw was trembling and he put his hand back on the casing of the clock he'd been working on. A gesture that Dance interpreted to mean he was desperately seeking comfort.

She sensed something else as well. Kinesic experts have to judge if the subject's responses are appropriate to the questions they've been asked or the facts they've been told. Hallerstein was troubled by the murders, yes, and afraid for himself and his treasures, but his reaction was out of proportion to what they'd been discussing.

She was about to explore this when the clock dealer explained exactly why he was so upset.

"He's leaving these clocks at the places where he kills his victims?" Hallerstein asked.

Sellitto nodded.

"Well, I have to tell you." His voice clutched and he continued in a whisper. "He didn't just buy two clocks. He bought ten."