Update: Boston Licensing Board determines the tavern did nothing wrong and that the attack was unforeseeable.

The historic Warren Tavern on Pleasant Street in Charlestown rarely has any trouble, but it does have a silent alarm behind the bar, which a worker pressed around 12:05 a.m. on April 3, after some men began beating a man who had asked them to stop pestering a group of women at the bar, police and a bar attorney told the licensing board at a hearing today. Read more.