We had a case like that here in Stone County, Arkansas. There was a couple calling themselves "Dewberry." They were the neighbors from Hell. They stole, quarreled with neighbors, shot near people to intimidate them, and so on. They kept big dogs and did nothing to control them.
A neighbor, a retired doctor, kept sheep (actually, they belonged to his daughter.) The dogs killed sheep -- a total of 62 of them.
Law enforcement would do nothing about it -- to complaints about shooting, they would say, "If we didn't see him do it, there's nothing we can do." To complaints about sheep killing, they would say, "That's a civil matter." And of course the Dewberrys, who had no property, were judgement-proof.
One day Dewberry's dogs were after Graves' daughter's sheep. Graves drove down the county road to a spot where he could get a clear shot at the dogs -- perfectly legal to shoot attacking dogs -- and opened fire.
Dewberry came out with his harridan of a wife behind him, egging him on, and fired at Graves with a .44 Magnum. Graves returned the favor with a .30-30. The bullet passed through Dewberry, killing him, and hit Dewberry's wife, crippling her.
Investigation turned up the fact that both "Dewberrys" were federal fugitives -- something that would have come to light if the very first complaints against them had been taken serously.
Graves has never been charged and never will be -- although he is out some serious legal expenses.