A man has told Perth Magistrates Court that a CBD worksite where a teenager died was "unsafe", but it was not his responsibility.
Wesley Ballantine died in the early hours of January 5, 2017, after falling at the old General Post Office building in Forrest Place.
He was involved in glass installation for an internal atrium roof when he fell 12 metres through a 'void' in the structure.
It was alleged Luke Corderoy's neglect as a director of Industrial Construction Services (ICS) led to the tragedy.
The prosecutor told the court ICS did not provide and maintain a workplace that was free of hazards.
But Mr Corderoy, who represented himself during the trial, has denied he was in a director's role with ICS, or that he was a manager.
The 50-year-old told the court his skill was in design, and while he was happy to help ICS, he had "nothing to do with staff".
He said he "didn't want anything to do with installation at all".
However, on the night of January 4, 2017, he was putting in actuators, because there had been "zero help" from another company.
"I wanted to do everything myself," he told the court, to ensure the "right wires were going to the right part of the box".
Mr Corderoy said he had known Wesley Ballantine for "many many years", before going on to describe his last moments.
Mr Corderoy said he was not sure why the 17-year-old was on site, and the teenager had said he was tired.
He told the court Wesley was hooked to a scaffold and was standing above him, trying to talk to him through the glass.
Work site 'unsafe', says defendant
Mr Corderoy told the court he could not hear Wesley, the teenager was "crouched down", and there was "a lot of yelling" as he was feeding him wire.
His account was that he then said to Wesley, "f*** off, let's leave it and knock off".
"That was the last I saw," Mr Corderoy said.
He told the court the site was "unsafe" and "should've been done differently".
He had no further involvement with glass installation on the site.
Mr Corderoy told the court the name of the company, ICS, had been derived from director Adam Forsyth's father's company in New Zealand, ISS, with the aim of being merged.
He said he only sought to help Mr Forysth because he didn't want to "leave a friend stranded on site".
"I didn't handle accounts, didn't handle the money," Mr Corderoy said.
Wesley's mother 'shaken' by evidence
In her closing statement, prosecutor Tanya Hollaway told the court the possibility of falling at the worksite was a "plain and obvious hazard" with "multiple trip hazards" and "open voids".
She said the court had heard from witnesses who believed Luke Corderoy was the owner, manager, or director of ICS.
He was, she said, in a "considerable position of authority at ICS", as an "officer of the company".
Ms Hollaway said ICS had duties to its workers, such as covering voids, training and supervision of staff, and said the tragedy was attributable to the company's neglect.
Wesley's mother, Regan Ballantine, attended the last day of the trial, to hear the prosecution summary.
"It's the first time in six years that I've been able to find out what happened," she said, outside court.
"Naturally I feel pretty shaken. It's really disturbing.
"You heard the prosecutor allege that there were witness statements to say people were working on the atrium ceiling in flip flops.
"I think that speaks to how egregious and cowboy that particular site was."
Ms Ballantine said the end of the trial was a major milestone.
"Today's hearing really took it out of me and I'm just so glad that it's over.
"It's such a huge weight, burden, anchor, shadow over your whole life.
"It's been impossible for me to close the chapter on the past because of this legal process and for what, a fine?"
Magistrate Thomas Hall said he would hand down his verdict on June 13.
