“The signature’s obvious. He likes strangling women with plastic bags.”

“Technically they weren’t strangled. They were asphyxiated. Suffocated. There’s a difference.”

“Okay.”

“There is something very familiar about the use of the plastic bag and the cord around the neck, but I was actually looking for something a little less obvious than the surface signature. I was also looking for connections or similarities between the women. If we find what connects them we’ll find the killer.”

“They were both strippers.”

“That’s part of it but a little broad. And, technically, one was a stripper and one was an exotic performer. There is a slight difference.”

“Whatever. They both showed their naked bodies off for a living. Is that the only connection you found?”

“Well, as you must have noticed, they were very similar in physical makeup. In fact, the difference in weight was only three pounds and the difference in height was half an inch. Facial structure and hair was also alike. A victim’s body type is a key component in terms of what makes them chosen. An opportunistic killer takes what comes along. But when you see two victims like this with exactly the same body type, it tells us this is a predator who is patient, who chooses.”

It looked like she had more to say but stopped. I waited but she didn’t continue.

“What?” I said. “You know more than you’re saying.”

She dropped the hesitation.

“When I was in Behavioral it was in the early days. The profilers often sat around and talked about the correlation between the predators we hunted and the predators in the wild. You’d be surprised how similar a serial killer can be to a leopard or a jackal. And the same could be said for victims. In fact, when it came to body types we often assigned victims animal types. These two women we would have called giraffes. They were tall and long-legged. Our predator has a taste for giraffes.”

I wanted to write some of this down to use later but I was afraid that any obvious recording of her interpretation of the files would cause her to shut down the exposition. So I tried not to even move.

“There’s something else,” she said. “At this point this is purely conjecture on my part. But both autopsies ascribe marks on each of the victims’ legs to ligature. I think that might be wrong.”

“Why?”

“Let me show you something.”

I finally moved. We were in seats that faced each other. I unbuckled and moved to the seat next to her. She went through the files and pulled several of the copies of photos from the crime scenes and the autopsies.

“Okay, you see the marks left above and below the knees here and here and here?”

“Yeah, like they were tied up.”

“Not quite.”

She used a clear polished fingernail to trace the markings on the victims as she explained.