“While walking away, (the suspect) suddenly swung with right hand at the side view mirror of a City of Boston Trash Truck owned by the Department of Parks and Recreation,” the police report states. “This malicious destruction of government property was observed by Officer and Employee who was sitting inside the vehicle.”

Some attendees of the South Boston St. Patrick's Day Parade are facing criminal charges including assault and battery on a police officer.

With St. Patrick’s Day celebrations picking up around the United States, here is what you need to know about this year’s Boston St. Patrick’s Day parade.