It is more than just George Floyd. The police shoot a man 9 times in the back. Does it really take 9 shots? Then we have the Breanna Taylor case. The police did not knock as they claimed they did. A woman was killed because they did not. The AG lied to the grand jury. When you let the police get away with it then even legitimate cases are questioned. Police officers are responsible for this.
A neighbor supported the police account of their announcement. What have you got that "proves" they didn't knock?
12 people say they didn't knock. The one that did initially said they did not and changed his story. Put 1 witness on the stand and the defense puts on 12 who contradict him. Then ask him to explain why he changed his story.