Please analyze the tweet "#RIPBiwott I think Robert oukos soul can now rejoice and rest in peace. Call an evil man evil and a good man a good man. He was an evil man" and classify its emotional content. Choose from the following emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If no emotions are detected, respond with "neutral or no emotion".