The Coast Guard Academy's senior enlisted leader, Command Master Chief Brett VerHulst, resigned his duties at the Coast Guard Academy on Tuesday and is being investigated over alleged inappropriate conduct. A spokesman said Wednesday that the Coast Guard Investigative Service is looking into the case but declined to say more about it, citing the investigation. The Coast Guard cannot provide details at this time in order to preserve the integrity of the investigation and to protect the Coast Guard's ability to take appropriate final action," said Cmdr. David Milne, an academy spokesman Academy Superintendent Rear Adm. Bill Kelly sent an email to staff Tuesday afternoon announcing the resignation, Milne confirmed. The news was first reported by Navy Times.