Augusta, Maine ? The Maine medical examiner’s office says a Harvard Business School student’s death was an accidental drowning.

Nathan Bihlmaier of Cambridge, Mass., went missing early Sunday after he was told to leave a waterfront bar for being visibly intoxicated. The 31-year-old’s body was recovered from Portland Harbor by divers Tuesday, and the autopsy was conducted Wednesday in Augusta.

Bihlmaier was last seen when he was asked to leave the Ri Ra Irish Pub where he was celebrating his upcoming graduation with two friends.

Bihlmaier, who was married and whose wife is expecting their first child, was scheduled to graduate from Harvard Business School on Thursday.

He was a native of Osborne, Kan., and a Kansas University graduate.