The facts will come out in court. If they are found to be negligent/incompetent they should be found guilty and punished.
Furthermore, the police chief offered a public apology which implies incompetence therefore some kind of guilt. It seems that procedures for missing persons were not executed correctly.
Some would say that the chief of police was naive beyond belief for issuing such a statement and making the state liable for compensation. Whether the state is guilty or not will be proven or disproven in court or following a public enquiry.
For him to to issue this statement shows how incompetent he is for holding this high office.