Atlanta used to have a ‘Red Dog’ squad. Went after drug pushers, etc. They got a ‘tip’ from an informant about drugs being sold at this house. They burst in no-knock and a little old lady sitting in her rocker shot back with her revolver. They killed her. Wrong house, informant was unreliable and eventually three of the ‘Dogs’ went to prison. A 92 year old black lady.
I recall reading FR threads about that killing back in ‘09 and some follow up threads.