This happened in Atlanta a couple of years ago, the indictment pretty well tells the story: Cops did a no-knock based on info supplied by a snitch, the cops claimed. The old lady fired at the door where the cops were trying to enter. The old lady missed, well trained cops shot each other up and killed the old lady, planted drugs at the scene, that they brought with them on the drug raid btw, after a search turned up nothing. Cops lied to investigators and tried to cover up their crime. What is not mentioned is that two of the cops were recently convicted of murder.