At the end of the pathway the beach opened suddenly before her, flat and seemingly limitless in the darkness, with wind-driven waves breaking in a phosphorous arc along the crest of hard dark sand. Ginger was behaving oddly. Usually he was straining at his leash at this point, anxious to be let loose on the beach so he could torment the gulls and sandpipers. Now he was sitting warily at her feet, peering intently into the grove of pine trees at the base of the dunes. Marcia Cromwell removed his leash and encouraged him to head down to the water’s edge. Instead, he immediately trotted off into the trees.

Marcia Cromwell hesitated before going after him. The police had recently uncovered an encampment of vagrant travelers there, and the trees were always strewn with empty beer cans and litter. She called out to Ginger several times, then removed a flashlight from her coat pocket and went in search of him. She spotted him a moment later, pawing at something on the ground at the base of one of the trees. Marcia Cromwell walked over to investigate. Then she began to scream.

The discovery of a corpse on the beach at Walcott immediately triggered activation of the Norfolk Constabulary’s Major Investigation Team. Established in September 2004 to conduct probes into crimes such as homicide, manslaughter, and rape, each team consists of a senior investigating officer, his deputy, an exhibits officer who processes crime-scene evidence, and an inquiry officer who interviews witnesses and suspects. Within thirty minutes of receiving Marcia Cromwell’s call, all four officers were on scene. Only two, the SIO and the exhibits officer, entered the trees at the base of the dunes. They wore yellow protective shoe covers in order to preserve any forensic evidence and examined the corpse by flashlight.

“How long has he been here?” asked the SIO.

“Between forty-eight and seventy-two hours, I’d say.”

“Preliminary cause of death?”

“Single gunshot wound to the back of the head. Execution-style, by the looks of it. But here’s the interesting thing.”

The crime-scene analyst shone a small Maglite at the lower right leg of the corpse.

“A splint?”

“Quite a good one, actually. But look at the wound. The coroner will have to make the final determination, but I’d be willing to wager it was caused by a bullet.”

“Caliber?”

“Looks like a nine-millimeter to me, but that’s not the interesting part. It’s several days older than the head wound, and whoever treated it knew exactly what she was doing?”

“She?”

“Elizabeth Halton is an emergency-room surgeon from Denver, Colorado. I could be wrong, but I think this corpse could well be one of the terrorists from Hyde Park. Didn’t COBRA and the Home Office tell us to be on the lookout for unexplained bullet wounds?”

“Yes, they did,” the SIO said.