Greg listened as he was informed of the things that Kevin had been doing, not showing his surprise or anger. That would come later in private. He did however allow his lip to curl in displeasure when the Investigators practically sneered over Kevin's title.
When Billings raised his hand Greg moved swiftly, pulling Kevin to him and staring down the other man. "Touch him and see what happens" he practically snarled, "You've done your duty now get off my property. I will deal with this"