They next went into the parents’ bedroom.

Decker stood against one wall and thought back to the diagrams in the old police reports. Bodies were right under the front window, side by side. Roy was closest to the window, Lucinda on the side nearest the bed. The glass had blackened and shattered from the heat. The plywood had been nailed to the exterior of the house, closing this gap.

Unlike their son’s room, this space had been emptied.

“What happened to the furniture?” asked Decker.

“I imagine it was all taken as evidence,” said Bogart. “And the firefighters might have had to carry some of the combustibles out while they were dealing with the blaze.”

Decker nodded. “Maybe we can find out for sure. And those square marks on the wall. Pictures hung there. I wonder what happened to them?”

Milligan said, “I can make some calls.”

Decker opened the closet door and shone his light around the interior. He was about to close the door when he stopped and leaned farther into the closet.

“Check this out.”

Bogart and Milligan joined him and stared at where Decker was pointing his light.

“‘AC + RB’?” said Bogart, reading off the faded letters someone had written on the side wall of the closet. “What does that mean?”

Decker took a picture of the writing with his phone. “I don’t know. They could have been there before the Marses even bought the place.”

“Maybe.”

“Or maybe the Marses wrote them. Which means it could be important.” Decker gazed around. “Who made the 911 call about the fire?”

Milligan said, “I don’t think they ever determined that.”

“People really didn’t use cell phones back then. And I doubt reception was great back then in this area. So it probably wasn’t a car driving past.”

“Well, it could have been. And then the people went to their house and called.”

Bogart said, “But if they’d done that they’d know where the call came from. They could trace it.”

Milligan was already nodding. “That’s true. I’ll have to check.”

They went back downstairs.

Here Decker saw what he had seen before. A faded picture of a young Melvin Mars in his high school football uniform. It was hanging on the wall. On a small shelf were more old photos of Mars at various ages.

“Surprised they’re still here,” said Bogart.

“Like you said, no one wants to come into a house where people were killed. And not too many people live out this way. And strangers passing by wouldn’t even be able to see the house from the road, particularly now with everything overgrown.”

Decker looked around some more.

“But it’s interesting what we’re not seeing.”

“What’s that?” asked Milligan.

“Pictures of Roy and Lucinda Mars.” He turned to Milligan. “It’s like they never even existed.”

CHAPTER

15

DECKER LOOKED AT his watch.

They had driven to the house where Ellen Tanner had hooked up with Melvin Mars that night. It was small, old, and set off by itself. There wasn’t another home within twenty miles of it. And back then it was probably even more isolated.

“Why’s a young woman living all the way out here by herself?” Decker had asked.

“Not really. He reiterated his innocence. We went over his actions on the night his parents were killed. He can’t explain the timing. He said he went to sleep at the motel and woke up when the police knocked on his door.”

“Well, he’s had two decades to perfect that story. But one thing does bother me.”

“What?”

“If he planned this all out, why can’t he come up with a plausible explanation for the time gap? He had to know it was going to be a problem.”

Bogart, who had been listening in, said, “Criminals usually