Greene nods his head. “Oh. I heard of you, now. Well, in the umpteen million meetings I’ve had going through every scary scenario that could happen in this city, nobody ever mentioned the possibility of sneaking in a large object, like a bomb, using a series of low-radar-profile inflatables hooked up like that.”

My cheeks turn red. “Sorry. Just asking a question.” I feel like I’m ten and interrupted my grandfather in the middle of one of his stories.

“Don’t be sorry, Agent. I’m paying you a compliment. We try to imagine the unimaginable. Now I got to go yell at somebody for not thinking of that. Hopefully he’ll tell me that our radar would catch it.”

Knoll rolls the idea around in his head. “You think that’s it?”

I shake my head. “No. I don’t. I don’t think she fell here. At least not from that high up. I don’t think the Warlock would chance setting off a hidden missile defense system. I was just thinking around things.”

Knoll makes a kind of grunt. I’m not sure if that means he gets what I’m saying or is just frustrated.

The girl’s eyes are looking right at me from the reflection in the pool of her blood. It’s as if they’re telling me something.

We’re missing a clue.

It’s got to be an obvious thing, like the feather or the sand.

Oh my God!

“What?” asks Knoll.

“Just a second!” I hold up my finger and pull out my phone to call Gerald back in Quantico. He picks up after three rings. “Gerald, you told me the girl’s name. How did we find it out?”

His voice still sounds hurt. “I found her photo in the database. But she doesn’t have a twin. A lot of close matches. But nobody with the same birth date.”

Knoll steps closer to listen. I explain to him and Gerald at the same time. It’s the Transmitted Woman effect. “He doesn’t need a genetic match. Just a girl who’s close enough physically. Like Swanson and the pilot. We’re meant to assume there was only one body. He picked two girls that look alike. This girl and another. That’s who we saw on the observation deck.”

“What do you mean?” asks Knoll.

“Chloe died almost two years ago. The Warlock used her and her twin because he needed to make it look like she only died hours before we found her. But this is different; the Warlock knows we’ll find out the identity of this girl. The other girl, the one who vanished from the Empire State Building, she’s not a twin. Just a double. The moment she vanished, this girl was planted here. Two girls.”

“I think I get it. But how?” asks Knoll.

I shake my head. “That’s not important right now. The other girl, she might still be alive! He knows as soon as she sees her face on the news, she’s going to talk to someone. That’s if he doesn’t already have her. We can still save her!”