“Duct tape across the waist and the upper thighs. And across her mouth.”

Moore released a deep breath. “Jesus.” Staring at Elena Ortiz, Moore had a disorienting flash of another young woman. Another corpse — a blonde, with meat-red slashes across her throat and abdomen.

“Diana Sterling,” he murmured.

“I’ve already pulled Sterling’s autopsy report,” said Tierney. “In case you need to review it.”

But Moore did not; the Sterling case, on which he had been lead detective, had never strayed far from his mind.

A year ago, thirty-year-old Diana Sterling, an employee at the Kendall and Lord Travel Agency, had been discovered nude and strapped to her bed with duct tape. Her throat and lower abdomen were slashed. The murder remained unsolved.

Dr. Tierney directed the exam light onto Elena Ortiz’s abdomen. The blood had been rinsed off earlier, and the edges of the incision were a pale pink.

“Trace evidence?” asked Moore.

“We picked off a few fibers before we washed her off. And there was a strand of hair, adhering to the wound margin.”

Moore looked up with sudden interest. “The victim’s?”

“Much shorter. A light brown.”

Elena Ortiz’s hair was black.

Rizzoli said, “We’ve already requested hair samples from everyone who came into contact with the body.”

Tierney directed their attention to the wound. “What we have here is a transverse cut. Surgeons call this a Maylard incision. The abdominal wall was incised layer by layer. First the skin, then the superficial fascia, then the muscle, and finally the pelvic peritoneum.”

“Like Sterling,” said Moore.

“Yes. Like Sterling. But there are differences.”

“What differences?”

“On Diana Sterling, there were a few jags in the incision, indicating hesitation, or uncertainty. You don’t see that here. Notice how cleanly this skin has been incised? There are no jags at all. He did this with absolute confidence.” Tierney’s gaze met Moore’s. “Our unsub is learning. He’s improved his technique.”