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While detectives are continuing to investigate allegations of battery against Justin Bieber, the case is being referred to the Los Angeles District Attorney's Office, ABC News has learned.

According to ABC News' Los Angeles station KABC, the Los Angeles Sheriff's Department has forwarded the case to the DA's Office for possible prosecution. Sheriff's detectives have already interviewed the alleged victim and plan to interview witnesses, according to a department release. They have also requested an interview with the singer.

Just days before his scuffle with a photographer Sunday, Bieber learned some boxing moves from heavyweight champ Mike Tyson himself.

A video of Bieber getting a lesson from Tyson has gone viral on YouTube. Tyson also posted the photo above of him posing with the singer before they started training.

It's not clear whether Bieber used some of the moves he learned on a photographer who was trying to snap pictures of the singer and his girlfriend, actress Selena Gomez. But now, the teen pop singer is being investigated for battery, according to ABC News Los Angeles station KABC.

Police tell ABC News that Bieber has still not come forward for questioning after the alleged knock-down blow-up that left the singer without a shoe and his girlfriend picking up his hat.

The photographer, who has not been identified, said Bieber struck him in the face as the mega couple exited a shopping center in Calabasas, Calif., on a Sunday afternoon movie date. Witnesses told ABC News that the photographer was blocking Bieber's car, leading to the star's reaction.

"They were stopping him from leaving the parking lot and that made him really mad," witness Summer Janis told ABC News.

Bieber and Gomez left before the authorities could arrive, KABC reported. But the photographer complained of pain and insisted on an ambulance. He also filed a police report, alleging battery by the 18-year-old singer, but sources tell TMZ he only did so after a lawyer passing by suggested that he could get some money out of it.

Sheriff's officials said the photographer was transported to a nearby hospital, where he was treated and  released.

Bieber has not commented on the confrontation but took to Twitter early Monday morning to say, "gonna focus on the important stuff, the music."