Ravne was rubbing his chin thoughtfully, after inspecting the evidence. That's what made it look like he was eating it. But you'd have to be weird to think that. As Ravne is the only one who knows what he did to Simmons during the underground case (as Simmons either doesn't remember or is no longer inhabiting her body) he's suspicious of what went on.
Hence him checking up on her later that night, which seems out of character for the man we've met - unless he's suspicious of the Simmons/Demon creature.
The question is, is Brand getting suspicions as well? Was he looking at her with compassion in her eyes, or does he think things aren't as they should be? And what will he do to Ravne when he discovers the truth.
Damn, but I really like this story, and am pleased to have such a good ongoing story added to the mix.