BOSTON — A visiting Harvard Law School professor has been arrested by ICE and will now self-deport, after a late-night pellet-gun incident outside a Brookline temple triggered a federal immigration review.

Carlos Portugal Gouvea, a Brazilian scholar teaching business law, admitted to firing a pellet gun near Temple Beth Zion in October, shattering a car window and alarming neighbors. He later took a plea deal, pleading guilty to the illegal discharge charge while three others were dropped.

But the case didn’t end in local court. The U.S. State Department revoked his J-1 visa, opening the door for ICE to move in. Federal agents took him into custody this week, and officials say he has agreed to leave the country rather than face formal deportation proceedings.

The sudden removal has stunned Harvard’s campus, where administrators have offered little detail about the professor’s rapid downfall — from teaching at the nation’s most elite law school to being forced out of the U.S. after a midnight pellet-gun scare.