“The police have traffic camera footage of his truck,” I said.

“They know he was near the reservoir.”

There was a sharp intake of breath on the other end of the line.

“Those cameras make mistakes,” she said quickly, her voice rising.

“The glare on the windshield makes everyone look the same.”

“Mother, they know the truck was gone until three in the morning,” I said.

“No,” she insisted.

“I heard the engine shut off at nine.