STATEN ISLAND, N.Y. -- A video has surfaced showing the arrest of the Mariners Harbor man accused of punching a police officer during the Staten Island St. Patrick's Parade on Sunday.

In the clip obtained by the Advance, a man identified by sources as 19-year-old Nicholas McGowan can be see on the ground, next to a toppled metal barrier.

He's surrounded by four police officers, two of whom grab his arms and pull him a few feet down the street.

"Why are you touching me? Why are you touching? Tommy!" he yells.

At one point, an off-camera onlooker asks, "What's going on?"

The video doesn't show what happened before McGowan was on the ground, and cuts out after 20 seconds.

The Advance also has obtained three photos of McGowan that sources close to the teen say were taken a day after the arrest.

The photos, which embedded data indicates were taken around 4 p.m. Monday on Staten Island, show McGowan with two swollen eyes, a large scrape on his forehead and a smaller scrape on his nose. It's not apparent from the photos when or how he sustained the injuries.

A police spokeswoman said Tuesday that the NYPD Internal Affairs Bureau has opened an investigation into an allegation of misconduct following the arrest, but couldn't be more specific on what that allegation entails.

Police described McGowan as intoxicated and said in court documents that he "refused to comply with (a) police officer's orders to disperse" at about 12:50 p.m. Sunday.

McGowan attacked NYPD Officer Jason Greenberg, shoving Greenberg with his shoulder and punching him in the face, police allege in a criminal complaint.

He also grabbed Greenberg's $400 pair of prescription eyeglasses from the officer's face and crushed them with his hands, and when officers tried to arrest him, he "locked his arms, refusing to be handcuffed, kicked at the arresting officers, fell on the floor and refused to be handcuffed when instructed," the criminal complaint alleges.

The officer suffered a laceration over his right eye, according to police.

Police also allege that McGowan had a gravity knife in his pants pocket.

McGowan's lawyer, John Esposito, told the Advance on Monday that the 19-year-old appeared at his Stapleton Criminal Court arraignment "badly beaten about the face and body."

Esposito wouldn't comment on the circumstances of the case and, on Tuesday, when asked about the video and photos, he declined comment.

McGowan's mother, who spoke to the Advance on Sunday night, did not return a message seeking comment Tuesday.