An FBI agent has been found guilty of assaulting a 15-year-old boy by shoving him to the ground, but he will not lose his job.

Gerald Rogero, a chief in the bureau's counter-terror unit, was caught on camera forcefully pushing the teenager over before getting into a scuffle with him and pulling out a gun.

A jury found the agent guilty of second-degree assault but acquitted him of first-degree assault and a gun charge, suggesting Rogero was wrong to strike the boy with an open hand but was within his rights to draw his weapon after the boy retaliated.

Despite the verdict, the FBI said Rogero, 46, would remain in active service.

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FBI agent Gerald Rogero, 46, shoved a 15-year-old boy (wearing a red hoodie) to the ground during a confrontation with the teenager's parents and has been found guilty of second-degree assault

Rogero, a chief in the bureau's counter-terror unit, was caught on camera forcefully pushing the boy over before getting into a scuffle with him and pulling out a gun

Tensions escalated when Rogero joined a female friend to pick up her one-year-old daughter from the girl's father, Edward Moawad, during a child custody drop-off in December last year, the Washington Post reported.

A cell phone video shows the FBI agent of 20 years, who was wearing civilian clothes, berating Mr Moawad for being late, calling him 'disrespectful'.

The argument spilled outside of the lobby of what appears to be an apartment building in Chevy Chase, Maryland, where Rogero is seen rowing with the father, his fiancee and her 15-year-old son.

As the teenager steps in to confront Rogero, the FBI agent can be heard saying: 'Don't act stupid or you are going to get yourself locked up.'

After the boy fails to back down, Rogero forcefully shoves him in the chest with an open hand, sending him flying backwards before crashing down on the sidewalk.

The shocked teenager leaps to his feet and squares up to the agent as his mother tries to pull him away.

Rogero (right) was seen rowing with the father (center, wearing a suit) of his friend's daughter, his fiancee (left) and her 15-year-old son (center left)

Pushed: After the boy fails to back down, Rogero forcefully shoves him in the chest with an open hand

The shocked teenager leaps to his feet and squares up to Rogero as his mother tries to pull him away (left), before scuffling with the agent (right)

Rogero pulled out his pistol and orders the teenager to put his hands on the head and get on the ground

Rogero immediately tells the boy, who was wearing a red hoodie and jeans, that he is under arrest but the teenager appears to have no intention of backing down.

'If I have to shoot you I will, don't make me shoot you,' the officer is heard saying as he grabs hold of the boy.

As his parents call the police, Rogero and the boy start grappling with each other and the youngster is seen reaching for the FBI agent's lower leg, where his handgun is strapped.

Police arrive on the scene shortly afterwards, at which point Rogero backs down, letting the teenager get to his feet

Rogero quickly pulls out his pistol and orders the teenager to put his hands on the head and get on the ground, which he does.

Mr Moawad remains surprising calm at this point but the boy's mother is more distressed. The agent tells her she will be arrested too.

He said: 'You're going to jail too. Assault on a federal officer. You struck me, you struck me.'

Speaking about her son, he added: 'He got in my space and he threatened me. I'm in my capacity 24 hours a day.'

Addressing the teenager, who is still lying on the ground, Rogero said: 'You wanted to fight me, I identified myself to you, I told you who I was, and you thought you were going to assault me and attack me and now you're going to jail.'

The boy insists that he did not assault him but Rogero is heard replying: 'If you tell me that you're going to f*** me up and if you step in my personal space, that's an assault.

'And your mother made the mistake of assaulting me too and I'm going to have her arrested as well.'

It is not clear whether the family were aware Rogero is an FBI agent, and the video does not appear to show him saying that he is.

Police arrive on the scene shortly afterwards, at which point Rogero backs down.

He was later charged with first-degree assault, second-degree assault and a weapons offence.

During a trial at Montgomery County Court last Friday Rogero spoke of the moment he warned the teenager that he had a gun.

'It was a subconscious thing that I said' to make him comply, he told the court.

Rogero's attorney argued the video confirmed the boy posed an 'imminent threat'.