The `Boyfriend` singer`s visit to Southampton, New York, hotspot South Pointe ended in a fight over the weekend and officers are trying to determine whether Justin coaxed his bodyguards into an alleged attack on a fellow clubber.
Southampton Police sergeant Todd Spencer told the New York Post newspaper: "That would be part of the investigation, whether Bieber directed them or not."
According to an eyewitness, the 19-year-old star was acting "like he was in `Die Hard`" outside the club, where 22-year-old Wayne Rennalls was allegedly beaten up by Justin`s security team after butting heads with the singer over a bow tie.
Wayne reportedly gave his white H&M accessory to a waitress after she complimented it. The female worker then went over to Justin`s roped-off VIP area to provide bottle service and Wayne followed in order to get his bow tie back - leading to a heated exchange with the star and his security.
A source said: "Wayne followed because he wanted his tie back. Then Bieber`s people got in his face.
"We thought it was all over, but it escalated outside when we heard Bieber yelling and talking s**t. He was screaming in Wayne`s direction, `Punk b***h!` Wayne thought somebody threw something at him. Wayne picked up a small rock and threw it back towards Justin.
"That`s when Wayne heard someone yell, `You done f***ed up now.` Justin jumped out the sunroof and slid down the car like he was in `Die Hard`. He dropped his shirt and threw his hat and wanted to throw hands. His people surrounded Wayne, who was getting punched from all angles."
Wayne reportedly suffered a black eye, busted lip and bruised ribs following the altercation and filed a police report the next day.