The scene looks the same as when I looked. There's only so much we can tell without resources, but... From what I've known, they look like accurate recreations. And the murderer didn't even bother to reenact the ways the body was tampered with...

But aside from that, the only clue found was a note in an envelope. [Presumably it's still on the table so he holds it up.] A different kind of calling card... of the so-called "Protobadger".