When I crawled into bed next to Sarah, she flicked off her light, turned her back to me, and pulled the covers up around her neck. I stared at the ceiling for an hour or more before finally falling asleep.

It was during this time, while still awake, that I started thinking about things that I had no business worrying about. For me, this should all be over, and yet …

Roger Carpington. They’d charged Roger Carpington with murder. They’d found the shovel in the trunk of his car.

I’d seen that shovel. It had been there, on the floor, next to Stefanie Knight’s body. How had it traveled from there into the trunk of Roger Carpington’s car?

Maybe, after I’d left, he’d come back. Maybe he was concerned that he’d left his fingerprints on it, so he came back, snuck inside, grabbed the shovel and threw it in his trunk.

I suppose.

Except by the time I’d left Stefanie Knight’s house, there was an Oakwood Town Council meeting under way. Carpington’s wife had told me, when I’d phoned his house looking for him, that the meeting had started at 6:30 P.M. The councilman would have had to excuse himself in the middle of a council meeting, drive across town, retrieve the shovel, drive back across town, take his seat again in the council chambers.

And he couldn’t have grabbed the shovel after the council meeting, after I’d seen him, because by then the police were already at the scene. Sarah had phoned when I was at the interview with Paul’s science teacher—Ms. Winslow or Wilton or whatever—and told me she’d sent a reporter to cover it.

The next morning, after a nearly sleepless night, I phoned the town clerk.

“Did Roger Carpington leave during the council meeting for a long time?” I asked.

“I’m not sure I should be answering your questions, Mr. Walker. This is a police matter.”

“I’m only asking the one question. Was he there for the whole meeting, or did he skip out for a while?”

The clerk sighed. “He was there the whole time.”

“Thank you.”

I called my good friend Detective Flint and told him what I had uncovered. He was not impressed. “Mr. Walker, really, you’ve done more than enough. We can look after this investigation on our own, thanks very much.”

“But what about that shovel? I saw it with my own eyes. I was there, in the garage, and saw it.”

“You must have the times screwed up, then. Maybe you were in her house earlier than you think. Listen, Mr. Walker, once again, we thank you for your help and all, but we’ve got our guy.”

so I let it go.

Maybe I was wrong about the time. Or maybe, just like there could have been a second shooter on the grassy knoll, there was a second shovel.