The Secretary shall prescribe regulations for the immediate investigation of marine casualties under this part to decide, as closely as possible—

(1) the cause of the casualty, including the cause of any death;

(2) whether an act of misconduct, incompetence, negligence, unskillfulness, or willful violation of law committed by any individual licensed, certificated, or documented under part E of this subtitle has contributed to the cause of the casualty, or to a death involved in the casualty, so that appropriate remedial action under chapter 77 of this title may be taken;

(3) whether an act of misconduct, incompetence, negligence, unskillfulness, or willful violation of law committed by any person, including an officer, employee, or member of the Coast Guard, contributed to the cause of the casualty, or to a death involved in the casualty;

(4) whether there is evidence that an act subjecting the offender to a civil penalty under the laws of the United States has been committed, so that appropriate action may be undertaken to collect the penalty;

(5) whether there is evidence that a criminal act under the laws of the United States has been committed, so that the matter may be referred to appropriate authorities for prosecution; and

(6) whether there is need for new laws or regulations, or amendment or repeal of existing laws or regulations, to prevent the recurrence of the casualty.