Police arrested a vice president from Bieber's record label, Island Def Jam Records, saying he wasn't cooperating with attempts to disperse the crowd.
James Roppo, 44, of Hoboken, N.J., was charged with a series of misdemeanors, including endangering the welfare of children and obstructing governmental administration.
"We asked for his help in getting the crowd to go away by sending out a Twitter message," said Nassau County Police Det. Lt. Kevin Smith. "By not cooperating with us, we feel he put lives in danger and the public at risk."