"Alright, SIR." The tech sergeant quickly got to work, the sound of the keyboard clattering.
Soon, the main screen began playing back footage from different cameras.
Lemont pulled over a chair and sat down, leaning forward, eyes fixed on the screen.
Time fast-forwarded, showing personnel and vehicles coming and going, mostly routine patrols and supply convoys.
He instructed the tech sergeant to focus on last night's recordings.
"Stop!" Lemont suddenly commanded.
The footage froze at 22:37 last night, on the east personnel passage.
A vehicle was swiping a card at the gate.
As it reached the gate, the window rolled down, revealing half a face on the screen.
Although the camera angle and lighting made the face somewhat obscure, Lemont recognized the person as resembling Song Heping at a glance.
"Zoom in, on the face."
