" She could kill someone else. Who’s to know?” Once again the detective turned and squinted out across the river. “It’s a problem,” he said quietly and morosely. “What to do? Hypothetically, I mean. Just forget it? Forget it and hope she gets”—Kinderman paused—“gets well?” He reached for a handkerchief and blew his nose. “Oh, well, I just don’t know. I don’t know. It’s a terrible decision,” he said as he searched for a clean, unused section of the handkerchief. “Yes, it’s awful. Just awful. Horrific. And I hate to be the one who has to make it.” He again "
― William Peter Blatty , The Exorcist