Pendergast didn't curse. He looked over his shoulder toward the frontage road, where the access lane curved out toward the interstate ramp. A mile south, through the gaps in the acoustic sound walls, a blue emergency strobe flared once against the clouds, then went black.
"Miller’s monitoring the state barracks frequency," Pendergast said, leading me through the security door into the small, overheated office. The room smelled of scorched coffee, industrial floor wax, and the dry ozone from four mainframe towers humming in the corner. "He knows the state car from Milton is out on an overturned milk tanker on Route 80. He thinks he’s got the district to himself until three in the morning."
He pulled a metal folding chair out from the counter and nudged it behind my knees. I sat down hard, the breath catching in my throat as the cold air of the room hit the sweat on my neck.
"Give me the boot," Pendergast said.
I unlaced the left work boot with my good hand, loosened the tongue, and pulled out the blue carbon slip. It was damp along the lower crease, but the bank teller’s stamp was clear.
Pendergast took a pair of plastic evidence tongs from his desk drawer, picked up the slip by its uncreased margin, and slid it into a clear mylar sleeve. He didn't use tape; he used a numbered red vinyl tag with an aluminum crimp, the kind used to seal evidence bags for federal grand juries.
"That's one," he said, entering the seven-digit serial number from the bank slip into his terminal. "Now show me David's box."
We walked out to the bed of the truck. Pendergast carried an insulated technician's case with a high-capacity drive reader and a certified digital hash recorder.
I unlocked the marine battery case behind the fifth-wheel hitch with the brass padlock key on my ring. Inside, nestled between two blocks of dense packing foam, was the aluminum junction box my son had milled on his Bridgeport lathe three months before the lymphoma took him. The red status light on the internal board was glowing steady, which meant the cache hadn't dropped a byte during the run across the corduroy road.
Pendergast unscrewed the four thumbscrews on the casing lid, reached in with insulated tweezers, and pulled the solid-state storage card from its slot. He held it up to the sodium floodlight, checking the gold contact pins for grit, then slid it into the portable reader plugged into his field monitor.
"File system is uncompressed raw," Pendergast muttered, tapping the membrane keyboard with two fingers. "David always did build things like he was expecting an artillery strike. He didn't use the standard consumer codec. This is direct-to-memory raw stream with a hardware timestamp embedded in every third frame."
He clicked the trackball once.
The monitor screen on the tailgate split into two views.
The left quadrant was the rear camera, mounted fifty-two inches off the tarmac in the center high brake light. It showed the chrome grille of Miller’s cruiser following eight feet behind my tailgate, close enough to read the inspection decal on his windshield. The timestamp in the lower left corner showed 20:41:12. The patrol car's high beams flared, deliberately bleaching my rear glass, then the vehicle surged forward, tapping the steel channel of my bumper with its push-bar—a textbook pit-maneuver threat used to force an older driver onto the soft shoulder.
The right quadrant was the cab-facing wide-angle. It showed my hands on the wheel, ten and two, perfectly steady, while the red emergency light from Miller’s grille reflected off the dash.
Then came the audio.
David hadn't used a cheap electret microphone. He had epoxied a balanced aircraft-grade transducer into the driver-side door skin, using the hollow sheet metal as a parabolic collector.
Through the reader's small speaker, Vance’s voice came out as clean and sharp as if he were standing on the scale apron:
"Don’t tense up, old man. You reach around like that on a dark shoulder, people get buried."
Then Miller’s boot against the lower cab rail:
"Two thousand even. All hundreds. You carrying drug money through our township, Mr. Vance?"
And my own voice, flat and slow: