The correct answer to this open question is the following.
The ultimate objective of the forensic investigation is to obtain evidence that will reveal the identity of the victim.
When we refer to forensic sciences, we need to understand that these activities are aimed at examining the evidence the police find in the scene of a crime. To find the facts of a crime, forensic experts have to use scientific techniques and principles because the results of the investigation have to be objective. The evidence these experts collect is going to be useful for juries in a trial.