Undoubtedly it was this that allowed the jury to return its verdict of not guilty. The jury may have felt that it had no choice. But that non-choice was given to it by the judge. Instructions to a jury are based on laws. Laws are made by legislators.
Legislators are, theoretically speaking of course, answerable to the people.
It would be more than worthwhile to obtain a transcript of these jury instructions, look up the relevant laws, and demand that they be rewritten. If they can allow a man to be shot 41 times in a lighted doorway, then they have to go, and so do any legislators standing in the way. This process should be undertaken not just in New York but in every state. I realize that this may sound naive. Laws alone will not stop murderous police.