Alex John Beeston, 32, attacked and broke Edward Haynes' jaw at a bus stop in Capalaba, east of Brisbane, in April last year after believing he had attacked a woman.

Beeston was found guilty on Tuesday after his Brisbane District Court trial heard he punched Mr Haynes, 29, twice.

Mr Haynes told the court he was on his way home from work at 9.40pm when Beeston confronted him and grabbed him around the neck.

"I was trying to get his arm off me. I couldn't breathe. He was choking me on the ground," Mr Haynes testified.

"I was getting up slowly when he hit me. It knocked me down."

Beeston first confronted Mr Haynes after hearing a woman screaming and demanded his name and ID.

Mr Haynes said his name was Eddie and handed Beeston his drivers licence.

Beeston then accused Mr Haynes of giving a fake name because the name on the licence was Edward, the prosecution said.

Mr Haynes ran away but fell over.

As he was trying to get up, he felt an elbow grip around his neck in a choke hold.

The court heard that was when Beeston pinned him to the ground and punched him twice because he suspected him of assaulting a woman.

Mr Haynes was taken by ambulance to hospital and later had an operation to repair his jaw with a metal plate.

Prosecutors argued Beeston punched Mr Haynes twice because he feared being laughed at when the first punch was a glancing blow.

The court heard Beeston, a painter who was born in New Zealand who was previously convicted of assaulting an ex-partner, is likely to be deported.

He has apologised to Mr Haynes, who since the attack has had long-term problems with his jaw and feels fearful when travelling to and from work.

"My actions were appalling on that night. I sincerely regret them," Beeston said.

"I want to apologise to my family. They didn't raise me this way."

He was remanded in custody and will be sentenced on Wednesday.

Australian Associated Press