As far as I know, there aren't any established popular ghost stories specifically linked to the Watts murders. The Watts murders are still fresh in people's minds as a real - life horror, and the focus has been on the human aspects of the crime - the motives, the victims, and the perpetrator. That being said, if in the future, local superstition or a creative storyteller might try to create a ghost story around it. Maybe something like the spirit of the victims haunting the place of the murders, but this is all speculation and not part of existing popular stories.
There are no widespread or well - documented ghost stories related to the Watts murders at present. Since the Watts murders are a recent and very real event, the public attention has been mainly on understanding the crime itself. However, in some communities, there might be whispers or unsubstantiated tales. For example, someone might claim to have seen a shadowy figure near the crime scene at night, which they attribute to the victims. But these are more in the realm of local superstition and not a part of any major or popular ghost story tradition.
There may not be many truly 'popular' ghost stories directly related to the Watts murders as it is a very recent and real - life tragic event. However, some might say that in the area where the murders took place, there could be rumors of strange noises or feelings of unease. But these are more likely to be the result of the psychological impact of the murders on the local community rather than actual ghosts. It's also possible that over time, as the story gets passed down, some elements of the supernatural might be added, but as of now, there are no well - known ghost stories directly associated with it.