So Emily bought a second camera.

A very small one, the kind that sits on a shelf and looks like a phone charger, and she put it on the console table in the entry hallway, angled at the front door.

She did not tell Nathan.

Michael’s team found it because Margaret told them to look.

Emily had mentioned it to her once, in passing, months earlier, in the specific tone women use when they are describing something small they have done that they don’t want a conversation about.

The camera uploaded continuously to a cloud account under Emily’s personal email.