Analyze the tweet "@mikeburke91 @AP I guess. It's just heartbreaking the ease with which they can kill an innocent man and get away with it." and indicate which emotions from the list (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) are expressed. If no emotions are found, answer with "neutral or no emotion".
anger, disgust, pessimism, sadness