1. Degradation: Over time, human remains deteriorate significantly. The level of decomposition makes it exceedingly challenging to recover useful DNA or other trace evidence that could be relevant to a modern crime investigation.
2. Limited Scientific Knowledge: Advances in forensic science and DNA analysis techniques have come a long way in recent decades. However, the standard of forensic analysis 100 years ago was far less sophisticated. As such, earlier examinations might have missed or misidentified crucial evidence.
3. Conflicting Context: The circumstances surrounding a crime a hundred years ago may be drastically different from those of today. Legal procedures, societal attitudes, and investigative techniques were fundamentally different, making it difficult to draw meaningful conclusions.
4. Ethical and Legal Concerns: Unearthing bodies without compelling reasons and proper consent can raise ethical and legal concerns. Privacy and respect for the deceased should be carefully considered, especially if there is no solid indication that the exhumation will directly contribute to solving an active case.
While exploring historical crimes and cold cases can provide valuable insights into past events, exhuming bodies specifically to solve contemporary unsolved murders is not a reliable or promising approach. Investigators primarily rely on advances in forensic science, technology, and the reexamination of existing evidence.