I sealed the envelope and left it on my desk where the camera would see anyone who touched it.

I stood it upright against the desk lamp, the way Marcus propped papers on his blotter.

Before leaving the room, I laid a single dark hair across the flap.

It was an old auditor’s habit.

A cheap test.

It had caught two office clerks in my first year on the job.

Then I texted Olivia two lines.

“I’ve got twelve minutes of footage.