“In the blueprint storeroom behind the old yard on Industrial,” I said.

“There’s a spare key hidden under a clay flowerpot outside the blueprint storage room,” Mark said.

“Go out there tonight and check the paper logs from three years back, before Garrett moved the server.”

“Why would the paper logs make any difference?” I asked.

“Garrett changed the digital files,” Mark said.

“Paper leaves ink trails that don’t disappear when a hard drive gets wiped.”

I stood up and reached for my wool coat.