Clark trembled as he extracted his cellphone, pulled up an address, and handed it over to Henry Jefferson.

Assistant Cooper grabbed the phone and with a tone of urgency declared, “Mr. Jefferson, it’s an abandoned factory in the outskirts.”

He quickly calculated the distance, then added, “Driving there would take at least three hours.”

Henry extended his hand, and Sophie passed him a coat. He draped it over his shoulders as he walked and commanded, “Call in the ...