Water had climbed almost to knee height during the storm.

There were fresh streaks on a concrete column, as though something muddy had scraped against it.

Near the back wall lay a scrap of cloth caught on a nail.

Jonah took a photograph before touching anything.

The cloth was blue, not green.

They called the detectives.

Two hours later the team found marks in the mud leading away from the station, up a steep bank toward an overgrown access lane.

They could have been made by a person, but the prints were badly distorted.