The inside of the building was cavernous and smelled strongly of damp concrete and fresh gray paint.

In the center of the rear wall stood a huge fireproof industrial vault cabinet anchored directly into the stone foundation.

“This is where I found the key,” Russell said, pointing his flashlight beam toward a hollow wooden support beam above the workbench.

I pulled the brass key marked 314 from my pocket and walked up to the steel cabinet.

Beneath the electronic keypad on the handle was a small, hidden keyway that matched the brass teeth perfectly.

I inserted the key, turned it clockwise until a heavy mechanical bolt slid back with a loud clank, and pulled the thick door open.