"And the elders of that city shall break the heifer's neck in the ravine"
When someone is murdered and the killer is not brought to justice for whatever reason, the soul of the dead person remains in this realm as a negative force and influence upon the community. In ancient times, the Elders of the town performed a ritual slaughter on a Heifer [calf] to remove this negativity.
Situations in life unexpectedly turn negative for no apparent reason. Whatever can possibly go wrong does so to the detriment of our well-being. There are no coincidences in life, no random events of chaos. It is our inability to perceive the metaphysical influences manifesting in our environment that creates the illusion of disorder. The spiritual energy of this passage eliminates unseen negative forces and influences from our life.