When he’d worked his way down one side of Main Street and up the other, Virgil walked around behind the buildings, first on the east side, then on the west. The east side was bricked in with commercial buildings: a Goodwill store, housed in an unpainted metal hobby barn, Burden’s Tractor & Implement, a car wash, the brick Fraternal Order of the Eagles, which was mostly a bar with a rooftop that might have provided a sniper’s nest, and STM Wine & Spirits. The Eagles club wasn’t open, but Virgil saw somebody walking around inside and banged on the door until Goran Bilbija pulled it open an inch, and said, “We’re closed.”

Virgil identified himself, and Bilbija let him in and pointed to a stairway that led to a second-floor office and storage room. Virgil looked in both, but neither had a window that a sniper could have shot out of. A ladder, bolted to the wall, led to the roof, with a hatch held in place by heavy hooks, the kind seen on barn doors.

“I don’t know the last time that was opened, but it’s been a while. When we retarred the roof—that was, mmm, five years ago?—we did it with ladders from the outside,” Bilbija said.

Virgil climbed the ladder anyway, got the hooks loose, and when he pushed up on the hatch a double handful of dust rained down on his hair and shoulders.

He managed to heave the hatch up onto the roof and climbed outside. When he looked at the hatch, he decided Bilbija was right: the thing hadn’t been opened in years, and part of the problem with pushing it open was that it had been tarred shut.

On the other hand, the roof had good sight lines to the places where the shooting victims had been standing. When Virgil walked around the roof, he found the second floor was built over half the structure, with the back half dropping to a single story. If someone had a short ladder—not even a stepladder but one of the three-step stools used to reach high cupboards—he could have climbed onto the back roof, then used the stool to climb to the top. Getting down would be even faster, if it had become necessary to flee. He could have gone from roof to roof with no more than a three-foot drop.

If the shooter climbed up and down the back of the building, between the wall and the dumpster by the kitchen door, he might even do it unseen.

Virgil put it down as a possibility. The roof didn’t show any footprints, discarded DNA-laden cigarette butts, a book of matches from a sleazy nightclub, an accidentally dropped driver’s license, or any other fictional possibilities, so he went back down the hatch and pulled it shut.

“Find anything?” Bilbija asked.

“A nice view, but . . . no.”