This is not the first time Miss Biden has been a guest of law enforcement in NYC either. In 2009 she was detained by Amtrak police for trying to fare beat.
Via MyFoxNYC:
The niece of Vice President Joe Biden was in police custody in New York City on Tuesday.
The NYPD says that officer took Caroline Biden into custody after responding to a report of a dispute at her Tribeca apartment.
Police said the 26-year-old scuffled with officers as they tried to break up a fight between her and her roommate.
Charges are reportedly pending. The vice president’s office declined to comment.
Biden was taken into custody after resisting arrest and becoming physically confrontational with officers. Officers were told the fight originally started over a rent related dispute between Biden and her as yet unnamed roommate. After resisting entry to a holding cell, Biden was transported to Beth-Israel Hospital after complaining of chest pains and difficulty breathing.
Seems Miss Biden was arrested and taken into custody yesterday for striking a NYC Police Officer, not the disturbance she caused to the public by fighting w/ her roommate

