If you witness a murder in your dream, expect a period of grief brought on by the harmful actions of those around you. Matters you care about may grow stagnant, and you may find yourself confronted with news of violent events.
If you are the one committing the act, your subconscious may be warning you that you are involved in something morally compromising — something that could permanently tarnish how others see you.
If you dream that you yourself are being murdered, take it as a signal that adversaries are quietly undermining you behind the scenes.