He's not licking the blood off a finger while Natasha is talking to the guards, what are you talking about.

The healer is only going to help that man so much and it leaves Lucifer with an air of satisfaction, eyes glinting when Natasha pulls him aside. He's very good at what he does when he wants to be. "If he's lying, we kill him," Lucifer says simply. That was the agreement, and Lucifer holds to his agreements. "Will it be a wasted trip if he is?" He shrugs. Maybe, but the provided portals have been making their ventures out of Thorne easier.

"I only need to grab my cloak," he says. "I can wait for him by the healer's and then meet you at the portal?"

He needs the man to walk he's certainly not going to do any more damage on him, yet. Until it's proven otherwise.