This is overkill. It's a setup to announce Rigg is the accomplice.

Or a setup for his alibi. Everyone around him keeps dying. Where is he to tell us he's innocent or what the hell these photos are doing in his apartment? Look there. [Shines a light to show ultraviolet paint]

"Four walls build a home?"

What does he want us to see on these walls?

The victims?

[Takes two photos]

One of these photos doesn't belong. [Takes off more pictures] This is who we're looking for. [The photos are of Jill Tuck]