Of course they need to investigate! WTH? It is a CRIME SCENE! A lover’s quarrell doesn’t explain more the THIRTY dead people! If you were a loved one of a victim, would you expect them to tell you what happened and why, or ould you just shrug and say, “Huh, lover’s quarrel.”
If the two lovers in question are both dead, what is there to investigate? So we can give some family members the gory details of their loved one’s death?