It Should be Law that Killings are Investigated

   Anytime there is a killing, the life lost deserves at least to have someone look into whether the death was justified and necessary.
   I do not know the law, whether federal or any state laws make it mandatory that there be an investigation. I believe, such a law should exist. I notice it is practice to investigate killings, but if it is not law, then there might be occasions where the killings are not investigated.
  Every killing, whether by criminal gangsters or by border agents, should be investigated.