BOSTON (AP) – Police publicly identified for the first time on Friday the officer who fired a lethal pepper-spray pellet into a crowd of celebrating Boston Red Sox fans, fatally injuring an Emerson College student.

Officer Rocheford Milien fired his pepper-spray pellet gun at a fan during the Oct. 21 disturbance, but missed and instead hit Victoria Snelgrove, 21, police said in an update of its investigation into her death. The shot hit Snelgrove in the eye, fatally injuring her.

Snelgrove, a journalism major from East Bridgewater, was among thousands of college-aged fans who flocked to Kenmore Square and Fenway Park when the Red Sox beat the New York Yankees for the American League pennant.

Messages left for police union officials were not immediately returned Friday night.

The investigation indicates that at least four people were hit by the projectiles, including Snelgrove. Officer Milien, a grenadier assigned to the police Special Operations unit, is certified as a trainer to instruct on the use of the weapon.