BOSTON (WBZ NewsRadio) — On the morning of September 10, 1994, Boston Police were left wondering what happened. The night before, the band Green Day had history, but for all the wrong reasons.

Twenty-five years ago, on September 9, 1994, a free Green Day concert was held at the Hatch Shell in Boston.

The band was topping the Billboard Alternative Rock charts at the time. Around 65,000 people had come to hear them play.