"Has that been ruled out?" Grand said.
"I don't know. No one's talking."
Grand thought for a moment. "It could have been a scavenger in the truck. I've seen raccoon footprints on deserted beaches. But there is something else that might suggest the involvement of an animal."
"What?"
"Remember the backpack we found in the creek? The lacerations?"
"That's right," Hannah said.
"I'm sure the crime lab will give them a complete examination," Grand said. "They'll check for animal hairs, any saliva the fabric may have soaked up-"
"And we'll never find out the results," Hannah said bitterly.
"Everything comes out in time," he said.
"Maybe, but I don't have your kind of eons to wait," Hannah replied. "When will you know what kind of animal your cave hair belongs to? I'd love to hit Gearhart with that before tomorrow's edition."
"That data should be ready now," he said as he booted his computer, "along with the results of the radiocarbon and gas chromatography tests."
"Radiocarbon I know about," she said. "Gas chromatography is… ?
"A process in which a substance is broken down to molecular pieces which are hitched to a carrier gas and then sent through a liquid or solid absorbent," Grand said. "The components are then sifted so they can be identified and measured."
"Oh. That gas chromatography," Hannah said.
Grand smiled. "It's like blowing smoke through a tissue and seeing the gunk that's left behind."
"Ah," Hannah smiled. "That I get."
"Every living thing metabolizes chemicals in very distinctive proportions," Grand said. "In case the first two tests aren't enough to tell us where the hair came from, the breakdowns give us a precise map to compare to other chemical maps."
"Got it. I want you to know I really appreciate this," she said as the computer's hard drive whirred. "Not just the information but being able to talk to someone. Someone who understands."
"I'm glad I can help," he said.
"I just don't want to drag you into the politics of it," she added quickly as she punched in a number. "Gearhart is my problem, the stonewalling son of a bitch. And now he's got Andrea Danza on his side-"
Hannah stopped as her phone beeped. She excused herself and pulled the phone from her bag. She spoke quietly while Grand returned to the computer. The conversation was a conference call with her advertising rep, who apparently wanted Hannah to run a series of feature articles about new trends in beach footwear in exchange for a six-month advertising guarantee from a manufacturer of a new kind of beach footwear. Grand was impressed by Hannah's insistent refusal to do "advertorials." He was also impressed by her ability to shift from an outpouring of rage to making quick, calm, confident decisions. Grand had never been able to make fast changes like that. Rebecca, who was always upbeat, used to have to nurse him from his pensive moods, something that usually took the better part of the morning or evening.
Maybe it's a gender thing. Grand thought. Males were territorial carnivores who found it difficult to leave anything without a struggle, even a state of mind. Females were more adaptable.
Hannah hung up and opened the Chris's Crinkles bags.
The smells brought back memories for Grand and he tried not to think about them. He concentrated on the list of data options. All the results on the hair sample tests were completed; the results of the mineral scraping would be done by early evening.
Grand booted the DNA results first.
As he looked at them, he shook his head.
"What's wrong?" Hannah asked.
Grand said without triumph, "I was right."
"About what," she said eagerly.
He pointed to the bags of food. "This is going to be dinner."
Chapter Twenty-Eight
The DNA results presented Grand with an impossibility. They showed the presence of metabolic activity in the hair samples, most actively in the gene that regulates the chemical breakdown of glucose. That ruled out the hairs having been part of a Chumash paintbrush. But the test did not produce a match in the database of mammals indigenous to Southern California. It was possible and not unprecedented that an animal from outside the area had escaped from a zoo, circus, or private collection. Either no one had noticed it or was afraid to acknowledge it for fear of lawsuits or insurance claims.
It also meant that he would have to run a lengthy series of tests comparing the DNA of the hair to the DNA of all the mammals that were in the database.
Before Grand did that, though, he decided to have a look at the other test results. What he found there might help to narrow the search. As he loaded the data from the radiocarbon dating, Hannah asked Grand to explain how the dating process worked.
"Carbon 14 is a more massive form of carbon, one that's radioactive and loses electrons as it decays," he told her. "Since carbon 14 is created by interaction between solar radiation and earth's atmosphere, it becomes integrated in carbon dioxide and is found in all living things. When something dies and the carbon in the system is no longer replenished, the carbon 14 already present begins to decay. Because the rate of decay is constant, we're able to accurately determine when living tissue last absorbed carbon 14."
"Understood," Hannah said. "Then how do you determine the age of nonliving things like rocks and pottery and the Shroud of Turin?"
"All rocks, minerals, and other nonliving matter contain different kinds of radioactive material such as uranium, thorium, potassium-40," Grand said. "Those decay into different states which are also measurable."
"I see," Hannah said. She plucked several fries from the bag and ate them. "So we could test these fries using radiocarbon dating because they were once alive."
"That's right." Grand smiled at Hannah. "At least, you're assuming they were. You have to read the fine print at a place like Chris's Crinkles."
"What do you mean?" Hannah said.
"The last time I went to the movies with Rebecca they had something they called 'buttery topping' for the popcorn and a 'frozen dairy product' where they used to have custard-"
"Are you saying that these may be fake spuds?"
"It wouldn't surprise me."
Hannah shrugged and ate several more fries. "You could be right. But Chris Sheehy is a local businessperson and an advertiser, so I've got to patronize her place. Anyway, who knows? Maybe next week one of your scientific colleagues will find out that eating dead things with carbon 14 is bad for us. Potassium-40 may be all the rage."
Grand smiled as the results of the radiocarbon daring began to appear on the monitor. While he read the data his smile evaporated. "It can't be," he said.
"What?"
Grand finished the file, then scrolled back and began reading the figures again slowly.
"What can't be?" Hannah pressed.
"The radiocarbon dating results," Grand said. "They say these hair samples are nearly eleven thousand years old."
"You're joking," Hannah said. "But according to the DNA findings the hairs came from a living creature," Hannah said.
"They did," Grand replied.
"Is there any way something could have contaminated your samples, like microbes or germs?" Hannah asked. "Maybe they were mistaken for signs of life in the hair."
"That can't happen at the DNA level," Grand said. "The tests Tami ran take apart the hair itself. There's no way of mistaking that for a microbe."
"Well, something's obviously wrong," Hannah said. "And if the DNA tests are foolproof-"
"Then there must be a mistake in the age," Grand said. "I'm going to check the DNA analysis. The tests also give us a chemical breakdown. There may be something in the hair, a chemical, mineral, or radioactive element that could have skewed the radiocarbon result."