Death Echo is a type of trapped Ghost. The spirit is stuck reenacting its death over and over in a loop. Sometimes the spirit can be shocked into moving on, particularly by someone with whom the deceased has an emotional connection.
An occasional by product of murder; a Death Echo is considered one of the more pitiful spirits in the series. They are spirits who are trapped in an endless cycle of their murder and the pain of their death. An Echo can be shocked out of the cycle and then pass through into the afterlife if they are confronted or calmed by a person they share an emotional link with. They are shown to disappear in a flash of light.