> because whoever was responsible for that would have had paid for it in front of the American legal system or American people

That literally never happened.

https://en.wikipedia.org/wiki/Haditha_massacre?wprov=sfla1

> By June 17, 2008, six defendants had their cases dropped and a seventh was found not guilty.[5] The only one of the eight charged to face punishment was Staff Sergeant Frank Wuterich. On October 3, 2007, the Article 32 hearing investigating officer recommended that charges of murder be dropped and Wuterich be tried for negligent homicide in the deaths of two women and five children.[6] Further charges of assault and manslaughter were ultimately dropped. Wuterich pled guilty to the only remaining charge, one count of negligent dereliction of duty, and was convicted on January 24, 2012.[7][8]