How to use "reveal" in a sentence

But they could not print details of the killer's mutilations, which the doctor did not reveal

Her original intention had been to accuse him of ripping apart Danny's room; she had been prepared to come on strong, so that even if he didn't want her to know he'd done it, he might be rattled enough to reveal his guilt

Right? Who knows what might make a person like that reveal himself? If he finds out there's going to be an exhumation, maybe he'll react strongly, give himself away