Now we have a timeline we can defend.”

We returned to the shoulder with the scene photographs.

Traffic had already disturbed some of the loose gravel.

The impressions collected the day before were more useful than anything we could see now.

There were tire marks that might have come from a passenger vehicle.

There were also my cruiser’s marks, ambulance marks, and tracks made by ordinary traffic passing the edge.

A narrower impression did not name a make of car.