Parker is accused to have caused grievous bodily harm to Lapan Nason on June 6, 2015, which resulted in his death two days later.
The trial resumed this morning where the state presented to the court the shirt that was worn by the deceased during the assault.
Police arresting officer attached with CID homicide, first constable Lenny Verage, showed the court the shirt. He conducted the record of interview on Parker on 11 June 2015.
A genetic medical expert also gave evidence of the shirt going to his possession for testing.
At the formal close of the prosecution's case, Parker was called to give evidence by the defense team.
He gave an account of what transpired the day before and that morning of 6 June, 2015.
He told the court that Nason was not present for work the previous day (June 5) for the inspection of a helicopter he brought from Canada, which needed certification from the Civil Aviation Safety Authority.
The court heard that he went home after work that day then went out gambling till 2:30am the next day.
He allegedly returned home at 3am after a night out playing pokies at Aviat and Lamana club.
The late Nason lived at Parker’s properties at Gorobe, Badili. He lived upstairs while Parker lived at the bottom property.
He went over to late Nason's house, calling his name.
He told the court he wanted to know where Nason was during the day and fired him soon after.
What actually transpired after that, between the hours of 4am and 6am on June 6, 2015, remains an issue that the court is now trying to establish from this trial.
The trial continues this afternoon.