Face of Murder

She had copied both equations onto large sheets of paper and tacked them to the walls, but it made no difference. She could still only get two-thirds of the way through the workings before she became hopelessly, utterly lost.

It was as if the last part of the equation just made no sense at all. It was so far above her head that it might as well have been written in a foreign alphabet.

“It’s late,” Shelley sighed.

She was right; it was. After waiting for the local cops to show up and handing Jensen Jones into their custody, then making their way back to HQ before settling in to work the slim leads they had, it was now past midnight. Pythagoras and Euler would be hungry, and Shelley’s daughter was no doubt already in bed since hours ago. They should have both been at home.

If this had been a normal, paperwork or testifying in court kind of day, they might have been. But this was a murder investigation kind of day, and that meant the work didn’t stop until someone was behind bars—or put into the morgue before they could take another life.

“You should go home.” Zoe nodded. She felt a little guilty, Shelley being away from home like this. A pair of grumpy cats were very much used to their owner not being home every day, and they had auto-feeders she could turn on whenever she was out of town for this very purpose. A small child would not understand why her mother was always late.

“You, too,” Shelley said. She had picked up her bag and coat, but stood in front of Zoe now without moving. Zoe caught the message loud and clear: Shelley wouldn’t go until she agreed to do so, as well.

She sighed and started to gather her things.

“Are you going to be okay?” Shelley asked. “You look tired. You’ll be fine for the drive home?”

“I am about as tired as you are,” Zoe pointed out. “I just want to crack this equation. Get somewhere with the case.”

“We are getting somewhere. There’s only so much we can do when we’re running low on sleep. A good night’s rest, and who knows? You might see something new when you approach it with fresh eyes.”

If Zoe had wanted advice from schoolroom posters, she could have looked it up herself. She shook her head brusquely, and did not reply.

“Seriously, Z. Take some time for yourself. If you don’t look after yourself, you won’t be any help to anyone. We need you sharp on this one,” Shelley said, obviously not reading Zoe’s irritation.

“I understand the importance of sleep,” Zoe snapped. “I do not intend to sit up until morning studying the equations. You do not have to worry.”

Shelley paused at the door, looking back at her with a softly trouble expression, a frown that only slightly creased her forehead. “I do worry, though. I see how hard you are on yourself.”

Not that Zoe had ever had that kind of mother—but Shelley sure as hell sounded like the stereotypical mother figure she had seen on TV. All nag, as if Zoe was just a child. Never mind that she was senior in her role, she was senior in age, too. She did not need a mother figure, and if she did, she wouldn’t choose a younger woman who was supposed to be taking her orders.

“I will be fine,” she said, her tone short and clipped, and brushed past Shelley to move quickly down the corridor. She opted to take the stairs, knowing Shelley would go down in the elevator, so that they did not have to share one another’s company all the way to the parking lot. The elevator moved at a much faster rate per floor than Zoe could manage on foot, particularly given the twists and turns of the stairwell, but she took them at a slow walking pace just to be sure.

As she walked down the fifteen steps in each block, and counted off the blocks before she would be underground with her car, Zoe’s mind was still on the equations. For all that she had said to Shelley, she probably wouldn’t be able to sleep well with the unsolvable numbers whirling around and around in her head.

They dominated her mind all through the drive home. Maybe Shelley had a little bit of a point about the state of mental distraction she was in, but she wasn’t about to admit that anytime soon. The equations just didn’t seem to make sense.

Whatever happened tomorrow, Zoe could only hope that she would hear something from one of Dr. Applewhite’s colleagues. They needed a break. No, she needed a break. Zoe desperately needed to know the answer to these puzzles—before they drove her mad.

***

As Zoe lay awake, staring up at her dark ceiling and listening to the soothing rainforest sounds that she played at night to shut out the calculations, a different scene entirely came into her head. Instead of the numbers, she thought about Dr. Applewhite. About a time, long ago, when she had been a young woman—and just beginning to trust Dr. Applewhite more than she had trusted anyone. Maybe more than she had ever even trusted herself.