We judge the facts.
Innocent until proven guilty, and beyond a reasonable doubt.
Don’t presume, don’t infer and watch out for any fallacy that causes prejudgement.
Suspend your belief, until it is time to debate: listen and learn.
Always the skeptic, question each other, argue the pro’s and con’s, etc.
Try to collaborate and cooperate. Even if he’s wrong, hear him out. If you start to fight each other, walk away, cool off, then try again.
Remember, it is a duty, and stay calm and reasonable.(This will not always happen, sometimes people hurt each other, then peace and forgiveness are necessary to start the rehabilitation process.)
There are no absolute answers. Sometimes a lot of time needs to pass before we can heal old wounds. Then we can return and work on the problem.