Beelzebub had watched the entire thing from his spot on a wall. He took his title as Lord of the Flies very literally sometimes, when it suited him. Once Jamie had been apprehended, he flew to the warehouse and changed back into a man.
He wanted to test the loyalty of the boy. Once Dantalion had assured him that Forehead was the epitome of martyr, he didn't see the point in testing him. The boy, however, he was different.
While the boy was out, Beelzebub paced. "Are you reading him?"