The Case Of Skeletons X

The whole lower middle-class society is rattled when two human skeletons are found in a flat. The cops rush into action. Be it the house owner, tenets, or even the watchman, no one is spared from the suspicion. The bizarreness of the case forces the police to investigate other cases where no bodies were found. While they are pursuing the old cases, two of the three tenets are killed. This raises one question; can the cops solve this complex case?