His employer's lawyers have almost certainly told him to shut the hell up. Liability will be HUGE.
You know there could be a more ominous explanation. Surely to God, when the Coast Guard asked him what happened he didn’t take the fifth to protect his employer. What does the Coast Guard say his explanation was?
Interesting enough the Captain probably was not at the helm of the ship. Ports have independent Pilots that steer ships out of Port. Reports are that were two Pilots on board. See link
https://en.m.wikipedia.org/wiki/Maritime_pilot