HANOVER, N.H. — Dartmouth College's president says one of three psychology professor facing sexual misconduct allegations has chosen to retire following an investigation and recommendation that the school fire him.

President Phil Hanlon announced Professor Todd Heatherton's retirement in a letter to the Dartmouth community Thursday. Heatherton has been on sabbatical.

He and two other professors were accused last year of creating a "hostile academic environment" marked by excessive drinking, favoritism and, at times, inappropriate behavior.

Heatherton acknowledged in a statement Thursday he "acted unprofessionally in public at conferences while intoxicated" and apologized to anyone affected by his actions.

Professors Paul Whalen and Bill Kelley are on paid leave. Hanlon says recommendations for them are under review by a faculty-elected council.

Hanlon says Dartmouth is cooperating with law enforcement officials on their separate investigation.