Owner's alibi

Exploration Stage: Burned-out Estate
From: Eli Montague
Description: I was working. Check your work place entry permit. It records the time I was in the storage unit. It shows that I was in the storage room when the fire occurred! The permit should be around here. I may have dropped it as I rushed home when I heard about the fire. Please help us find it.
Completed: Did you find it? Look at the numbers on the permit! I was still at work when they called the fire brigade. I cannot entrust my permit to anyone else. It is for my exclusive use. But I will not burn down my house or endanger the lives of my family or my collection of old documents. Believe me!