the discarded battery. It might have fingerprints. He would’ve done that anyway, but he’ll like that touch. I know this man. And he’ll like you, too. Tell him you’re driving all the way to Chicago to bring him a flat tire. The crime lab should find a tool mark on the air valve.”
He just stared at her in lieu of asking any more questions.
“The killer loosened the tire’s air valve,” she said. “Then he replaced the cap. He needed to disable the car, but he wanted it to stop down the road and away from witnesses. So the victim pulls over with a flat tire and checks it out with that little flashlight. He’s on a dark road, no lampposts. He can’t find any holes in his tire. Probably figures the problem is wear. The other three tires looked due for a change. And he couldn’t see much with that little flashlight of his. You’ve got the size of the broken bulb on your inventory?”
“Yes, ma’am. It’s a small one.”
“Close enough.”
“But won’t Detective Kronewald have to turn all of this over to the FBI?”
“He will-a piece at a time-every screwup Cadwaller made today, and Kronewald’s going to love every minute of it. Then he’ll probably solve the case for the feds. He’s a good detective.” She picked up her knapsack and rose from the table. “I’m out of here.”
“Wait, ma’am. Please? One more question? Why didn’t t he killer just steal Mr. Linden’s c e ll phone?”
“Good question,” said Mallory-with no sarcasm. “It helps if you know the murder weapon’s not a gun. It’s a sharp object. Kronewald wouldn’t like it if he knew I told you that.”
The trooper shook his head to say he would never betray her.
The lesson went on. “The killer went to a lot of trouble to remove that battery, and that was risky. He probably borrowed the phone from Linden, then told him it wasn’t working. That’s why Linden had it plugged into the car charger. He thought the battery was dead.”
“What about the tire? Why didn’t he just slash it? Or a puncture-a small hole for a slow leak. Why risk being seen fooling with that air valve?”
Mallory waited for the trooper to answer his own question. He had a good brain, and he must learn to use it.
The trooper nodded his understanding. “The killer wanted everything to look normal when Mr. Linden stopped on that road. If the phone was stolen-if the tire was slashed-”
Mallory was nodding, prompting him. “And don’t forget the caravan connection. The victim was on his way to join them. Gerald Linden already had murder on his mind. If he was suspicious, maybe scared-”
“The killer wouldn’t have gotten close enough to do him in-not without a fight.”
“That’s right.” Mallory was making her escape as she spoke-almost free. “So Linden’s out on a dark road with a flat tire, a weak flashlight and a dead cell phone. And suddenly-a dream come true.”
“Along comes a Good Samaritan-to kill him.”
“Now you’ve got it.” Her eye was on the clock; her hand was on the door. “And it was a familiar face. This was the man who borrowed his cell phone. Linden walked right up to his killer and shook the man’s hand.”
“Wait.” The trooper was rising from the booth as Mallory was backing out of the diner. “Where can I reach you?”
“You can’t. ”
The door closed
on the New York detective, and the trooper settled back into the booth to gather up his notes and posters. He looked out the win- dow in time to see the silver convertible when it was only
aiming
at the road. A second later, a fly had found him. In the time it took to swat an insect, Mallory was gone. He could see over a fairly long stretch of open country, but he could not see her car. She had just traveled from zero miles per hour to
gone.
This vanishing act was the only event of the day that did not have a clear explanation-considering the vehicle that she was driving-and it would color his permanent memory of her. Over the years to come,
Terry Pratchett
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