Holtzmann padded into his home office, closed the door behind him, and turned on the secure terminal. He swiped his finger across the print reader, held still for the retinal scan, and then spoke his passphrase.

The terminal came alive, the Department of Homeland Security’s eagle-and-shield logo emblazoned on the screen, the ERD’s smaller atom-double-helix-and-shield sigil superimposed on its bottom right corner.

He navigated through the system, into Project November. Cooper’s team had built this, under his supervision. He’d hated that they’d made this, but it had been a miniscule crime compared to the ones he faced now.

He ignored the source code, pulled up the specifications instead. There, the on-the-wire protocol definition. He took snapshots of the data on the screen with his mind’s eye, forced his Nexus OS to commit them to storage. Then one more thing. The encryption key. Where did it live? He trawled through config options. There it was. The key itself was obscured. He had to re-enter his passphrase, his voice shaking so much he was surprised that the system took it, then answer three challenges, and then and only then the system revealed the key to him. It was a long string of hexadecimal that would make no sense to a human, but which would unlock the communication between November node and November controller. He took a snapshot of the key, verified that it was saved, then disconnected himself from the system.

His heart was pounding now. He was sweating. His breath came short. He was wrong. He was sure he was wrong. He must be wrong. But what if he was right?

He wanted another opiate surge. He wanted to make it all go away. But he couldn’t. He couldn’t. This was too big. He had to know.

Holtzmann darkened the terminal screen, leaned back in his chair, his eyes closed, and went back to his memories of that horrible day in July. The comms log. There. The encrypted traffic he’d picked up.

Encrypted data. On a Nexus frequency. Joe Duran scowling as Holtzmann looked back and forth, looked for the source behind him.

?RU5L8PP0hLarBNxfoQM23wG6+KTCEBhOIAAQyPPc76+TWhj+X/

He took the encrypted transmissions, opened them in a decryption app, and applied the private key.

The key matched.

The assassins hadn’t just used Nexus from his lab. They’d used his code. That was how they’d pulled off an attack so sophisticated, so far beyond what the PLF had done in years. They’d used his work.

His heart wanted to burst out of his chest now. His face was flushed. He wanted to scream and to weep.

One last thing to check. He pulled the on-the-wire protocol definition up in his mind’s eye, let it fill the top half of his vision while the decrypted communication filled the bottom half.