A FORENSIC pathologist has told a court about the injuries a man sustained which eventually led to his death.
He said a single stab wound to the chest was the fatal blow.
Nanango man Stephen Joseph Doyle, 41, has pleaded not guilty in the Brisbane Supreme Court to murdering Laidley man Michael Tomsen, 37, at the party in Nanango on September 3, 2011.
Mr Tomsen was at the party celebrating his daughter's engagement when he was killed.
Pathologist Alex Olumbe told the court on Thursday about detailed injuries he observed on Mr Tomsen's body when conducting the autopsy.
"There were two wounds to Mr Tomsen's body that were consistent with being caused by a sharp implement," he said.
"They were located in the right upper chest and outer upper right arm.
"The wound to the chest was 27mm long by 10mm wide.
"The wound to the chest was definitely a stab wound."
Mr Olumbe said he noticed other injuries to Mr Tomsen's body during the autopsy.
"He also had significant bruises and abrasions to his head and face," he said.
"There was also significant bruising to his chin and the right-hand side of his jaw.
"I also noticed significant bruising around his left eye."
Mr Olumbe said he did not notice and bruising or injuries to Mr Tomsen's hands or knuckles.
He told the court that would suggest he had not used them in the altercation.
The trial before Justice Ann Lyons continues.