To dream that you have committed a murder indicates that you are putting an end to an old habit and a former way of thinking. This could also refer to an end to an addiction. Alternatively, the dream indicates that you have some repressed aggression or rage at yourself or at someone. "Note also that dreams of murder occur frequently during periods of depression." To dream that you witness a murder indicates deep-seated anger towards somebody. Consider how the victim represents aspects of yourself that you want to destroy or eliminate.