The case stemmed from an incident in 2009, when thousands of unruly girls turned up at a Long Island clothing store to see the teen pop star sign autographs. Police hadn't been expecting the crowd, and ordered the event cancelled.
Def Jam Records executive James Roppo was arrested after police said he refused to help disperse the crowd. Months later, police also pressed child endangerment charges against Bieber's manager, Scott Braun.
Braun hadn't been at the mall, but police said that when reached by phone he initially refused an order to send out a Twitter message to Bieber's fans telling them the singer wouldn't appear.
Prosecutors told a judge Friday that they are dropping charges against both men.
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