No criminal charges will be brought against the officers involved in the fatal shooting of a college student at a raucous celebration by Red Sox fans last fall, prosecutors said Monday.

"There is no evidence that any officer on Lansdowne Street acted with any intent to commit a crime," Suffolk District Attorney Daniel F. Conley said at a news conference.

Victoria Snelgrove, a 21-year-old Emerson College student, was shot in the eye socket with a pepper-spray pellet outside Fenway Park on Oct. 21. Officers were trying to calm the crowd that had filled the streets after Boston defeated the New York Yankees to win the American League pennant.

Conley said that police made a string of serious errors in the events leading up to her death but that none of those mistakes rose to the level of criminal charges.

"Let me be very clear: Victoria Snelgrove's death was avoidable," Conley said. "Poor judgment, however, is not the standard for criminal charges."

Police said some of the revelers were throwing bottles, lighting fires and wrecking cars. Snelgrove was not involved in the rioting but was hit when an officer aimed at another reveler who was throwing objects at police.