Part 008 · CHAPTER 3: The Time Window | 2 of 2

The digital-evidence analyst began by explaining why the line was less precise than it looked.

The answer took several minutes.

A phone could record different kinds of location information depending on what services were active. Some points came from application data, some from network records, some from combinations of sources. Device clocks could differ slightly. A stored location point did not mean a phone had remained fixed at that coordinate until the next recorded point appeared. An absence of a point did not prove an absence of movement.

By the time the analyst finished that explanation, Teresa Ward was pressing her thumb along the edge of her notebook, and Peter Lang had stared at the same corner of the ceiling long enough that Darius wondered whether there was a stain there.

Darius kept writing.

Source. Range. Not continuous.

At BayLine, a time stamp with an unknown clock offset could turn a neat sequence into an argument. He had watched people copy approximate system times into reports until the approximation disappeared and the final document made events look certain to the second. He did not intend to do the same thing because the line on the screen looked clean.

Brogan asked the analyst for the most conservative reconstruction supported by the records.

The analyst walked through it without assigning exact seconds. The household records and phone data supported a range for when Evan's phone departed the immediate area of the Whitcomb home. Later records placed the device near the restaurant during the period when the order was delayed. Transaction records and location data then supported movement toward the pharmacy. Pharmacy records fixed the transaction within another range. The phone data then showed the device returning toward Westbridge.

"Are those exact arrival and departure times?" Brogan asked.

"No."

"Why not?"

"Because the sources are not all measuring the same thing. A payment time tells you when a transaction was processed. A location point tells you the device generated or transmitted location information associated with an area. A text time tells you when the messaging system recorded the message. They can corroborate each other without becoming identical measurements."

Brogan pointed to a shaded section on the map.

"What does this shaded interval represent?"

"The period during which the records support that Mr. Whitcomb's phone was away from the residence, allowing for the uncertainties I described."

"And is the interval long enough to include the period in which the children could have been killed?"

Hale stood. "Objection. Foundation as to the medical timing."

Judge Bell looked at Brogan.

"I'll rephrase."

Brogan turned back to the witness. "Does your analysis establish a substantial period when Evan Whitcomb's device was away from the home?"

"Yes."

"Does it show the restaurant delay occurring within that period?"

"Yes."

"The pharmacy stop?"

"Yes."

"And the text asking how long?"

"The message occurred during the restaurant portion of the reconstructed route, yes."

Brogan displayed a second panel beside the route map. It placed the restaurant-system activity, the text exchange, the pharmacy transaction and the phone-location points in vertical rows rather than pretending they shared a single perfect clock.

Darius liked that display better.

He wrote: overlap, not exact synchronization.

Brogan asked whether the records showed Nora checking the restaurant estimate after Evan left. The analyst said the application record supported activity associated with the order from the household account during the relevant period. The witness could not identify a person's hand from the digital record alone, but Evan's testimony and the account history were part of the evidentiary context.

"Can you say Nora Whitcomb was holding the device when that activity occurred?"

"Not from the data alone."

"Can you say she sent the text asking how long?"

"I can say the message was sent from the number attributed to her phone. Identity of the person physically typing is not something the record itself proves."

Brogan nodded. "But paired with Mr. Whitcomb's testimony?"

Hale rose. "Objection. The jury can assess the testimony."

"Sustained."

Brogan moved on.

The analyst testified that the phone-location records did not place Nora inside a bedroom, hallway or any other particular part of the house. They did not show what she was doing. They did not record thoughts, conversations that occurred off-device or physical acts that left no digital trace.

"What can they show?" Brogan asked.

"Movement and device activity within the limitations I've described. In this case, the strongest point is the duration and sequence of Mr. Whitcomb's device leaving, stopping at locations consistent with the restaurant and pharmacy records, and returning."

Hale approached for cross-examination with three pages of notes and used almost none of them.

"You used the phrase strongest point. That's strongest from a digital-analysis standpoint."

"Correct."

"Not strongest evidence of anyone's mental state."

"I don't offer mental-state opinions."

"You cannot tell the jury whether a person who knew her husband would be gone for a period of time was psychotic."

"No."

"Or whether she understood right and wrong."

Brogan objected.

Judge Bell sustained it. "Counsel, keep the witness within the witness's field."

Hale nodded. "You cannot tell us what Nora Whitcomb believed."

"Correct."

"You cannot tell us why someone checked a restaurant estimate."

"Correct."

"And the map does not establish where Mrs. Whitcomb was standing inside her home at any moment."

"Correct."

Hale moved to the timing limits.

She asked whether two devices could differ by seconds or, depending on settings and source, more than that. The analyst said yes. She asked whether an application could log activity after an action had begun. Yes. Whether a network event could be recorded at a server time different from the time visible to a user. Yes. Whether a location point could represent an area rather than a specific spot. Yes.

Peter Lang stopped looking at the ceiling and started rolling his pen between two fingers.

Darius knew what the cross-examination was doing. It was widening every edge. That did not necessarily erase the middle. The restaurant record did not have to agree with a location point to the second for both to place Evan away from home. The pharmacy transaction did not prove when he stepped through its door, but it gave the route another fixed event. The records were weaker when asked to narrate every minute and stronger when asked only whether the errand had unfolded in the order Evan described.

Hale pointed to the shaded interval.

"So this is not a stopwatch."

"No."

"It is not a second-by-second account of the Whitcomb home."

"No."

"It cannot tell us what happened inside the home during every minute of this shaded area."

"Correct."

"Thank you."

Brogan stood for redirect.

"Even with every limitation Ms. Hale just identified, do the records leave reasonable uncertainty about whether Mr. Whitcomb went to the restaurant and pharmacy before returning home?"

Hale rose. "Objection. 'Reasonable' invades the jury's function."

"Sustained."

Brogan rephrased. "Do the different record sources corroborate the route he described?"

"Yes."

"Do they corroborate that the errand took longer than a direct restaurant pickup would have taken?"

"Yes. The restaurant delay and the pharmacy stop both add time to the reconstructed absence."

"Nothing further."

Hale had no recross.

The analyst stepped down. The route map remained on the easel beside the witness stand, its shaded band wider than a precise line and narrower than the uncertainty Darius felt about what it meant.

Judge Bell announced the midday recess and repeated the instruction not to discuss the case.

Darius ordered regular coffee and discovered after the first swallow that the cashier had given him hazelnut.

He considered taking it back.

The line behind him reached halfway across the cafeteria, and the cup was already open. He carried it to the table with the others and drank it anyway.

Nobody discussed Evan Whitcomb.

Nobody discussed the map.

Lydia Brooks had brought the permitted preliminary instruction sheet folded into quarters. She opened it beside her lunch and read one section twice, tracing a line with the cap of her pen. When she noticed Darius glance toward the page, she turned it slightly away, not secretively, just enough to make clear that she was reading for herself.

Across from her, Peter sat with an unopened bag of chips between his hands and stared past the vending machines.

Monica asked if anyone knew whether the cafeteria soup was always that color.

"I think that's legally soup," Peter said.

Amanda looked at him. "We're not supposed to discuss legal questions."

For a second Peter seemed unsure whether she was serious. Then Amanda smiled.

It was the first laugh at the table, brief and grateful.

Darius drank more of the wrong coffee.

The instruction sheet Lydia had been reading bothered him without his seeing the words. He knew the part that mattered. The legal question was not whether Nora had planned. Hale had said that in opening, and Judge Bell's preliminary instructions had made clear that criminal responsibility involved capacity, not a private common-sense test for whether conduct looked organized.

Still, the route pulled at him.

Dinner could have been delivered. Nora had suggested pickup. She had already contacted the pharmacy. She knew Evan still had to go there. She had access to the restaurant estimate. A message from her number asked how long while he waited.

That looked like planning.

The clean rule his mind wanted was simple: if she planned enough to create privacy, she understood enough to be responsible.

The judge had given them no such rule.

Darius hated rules that existed only because the result felt right.

At work, a report could say a sensor fault happened before an operator response. It could say the operator then made a bad choice. It could say both. What it could not do was turn sequence into motive without a basis for the step.

The errand records were not motive. They were conditions and timing.

But timing was not nothing either.

He looked at the coffee cup and tried to state the question without answering it.

If Nora had created or extended a period when Evan could not interfere, did that show she understood that other people would stop her because she knew what she intended was wrong?

Or could a person inside a delusional belief still avoid interference for reasons that made sense only inside the illness?

Darius knew which possibility pulled harder at him.

That was not the same thing as knowing which one the evidence would prove.

The court officer appeared at the cafeteria entrance and raised a hand.

"Jurors, we're heading back."

Lydia folded the instruction sheet. Peter finally opened the chips and then had to roll the top closed again without eating any.

Back in the courtroom, Darius returned to Seat Eight and opened his notebook to a clean page.

The route map was still on the easel.

The final display showed the Whitcomb residence at one end and Evan's phone moving away from Westbridge, then through the restaurant and pharmacy portions of the route before turning home again. Nora had remained at the house with Alice, Thomas and Samuel.

Darius looked at the shaded interval between departure and return.

He circled it in his mind and left the page in front of him blank.