Plague of Pythons by Frederik Pohl — Read

The odd thing about Chandler's dilemma was not merely that he was innocent -- in a way, that is -- but that many who were guilty (in a way; as guilty as he himself, at any rate) were free and honored citizens. Chandler himself was a widower because his own wife had been murdered. He had seen the murderer leaving the scene of the crime, and the man he had seen was in the courtroom today, watching Chandler's own trial. Of the six hundred or so in the court, at least fifty were known to have taken part in one or more provable acts of murder, rape, arson, theft, sodomy, vandalism, assault and battery or a dozen other offenses indictable under the laws of the state. Of course, that could be said of almost any community in the world in those years; Chandler's was not unique. What had put Chandler in the dock was not what his body had been seen to do, but the place in which it had been seen to do it. For everybody knew that medicine and agriculture were never molested by the demons.

Chandler's own lawyer had pointed that out to him the day before the trial. "If it was anywhere but at the McKelvey plant, all right, but there's never been any trouble there. You know that. The trouble with you laymen is you think of lawyers in terms of Perry Mason, right? Rabbit out of the hat stuff. Well, I can't do that. I can only present your case, whatever it is, the best way possible. And the best thing I can do for your case right now is tell you you haven't got one. " At that time the lawyer was still trying to be fair. He was even casting around for some thought he could use to convince himself that his client was innocent, though he had frankly admitted as soon as he introduced himself that he didn't have much hope there.