Teen pop sensation Justin Bieber’s Atlanta-based manager Scott “Scooter” Braun surrendered to police today and will be arraigned on charges of reckless endangerment and criminal nuisance.

He pleaded not guilty, AP reported this evening.

Last November, at a mall on Long Island, five people ended up in the hospital after a fracas  started after a bigger-than-expected crowd showed up for a Bieber appearance. Estimates had the crowd at 1,000 plus. Bieber ended up not showing up.

The cops accused Braun of delaying the dissemination of information that the event had been canceled until it became unruly. His lawyer had claimed the delay had been only seven minutes, not 90 minutes, according to an AP story. The cops say Braun deliberately kept up a Tweet on Bieber’s Twitter page saying the event was still going on until he was first taken to custody last November 20.

Braun’s cel phone voice mail is (not surprisingly) full so I could not leave a message.

The AP story says Braun faces up to a year in prison if convicted. Police also arrested a vice president at Bieber’s record label. Braun is now free. An April 7 hearing has been set.

Bieber, in a Tweet today, wrote, “You’ve got my total support. Wish you were here in Chicago with us.”

Braun discovered Bieber three years ago after seeing Bieber’s YouTube videos.

Bieber’s album “My World 2.0″ came out yesterday and according to billboard.com , will be the No. 1 album next week, with estimates of 225,000 to 250,000 albums sold. His current single “Baby” is rapidly climbing the pop charts.