Closing arguments in the murder trial into the death of an Irish man in North Carolina two years ago have been postponed in order for the judge to rule on elements of the charge.

Molly Martens-Corbett, 33, and her 67-year-old father Thomas Martens are charged with second-degree murder over the death of 39-year-old Jason Corbett at his home in Wallburg, North Carolina on 2 August 2015.

Both have pleaded not guilty to those charges, claiming self-defence.

This afternoon, a charge of voluntary manslaughter was reinstated as a charge for the jury to consider.

Jurors can now find the defendants guilty of manslaughter, even if the offence does not rise to the level of second-degree murder.

This morning Ms Martens-Corbett elected not to testify.

Trial judge David Lee told the jury that Ms Martens-Corbett's decision was not to be considered by jurors as an admission of guilt.

Earlier this morning, Mr Martens told the court he had brought a baseball bat to the Corbett residence as a gift to Mr Corbett's son, Jack.

Mr Martens was also questioned about his relationship with Mr Corbett.

"Our relationship was as it had been for quite some time," Mr Martens said. "We had made nice. We were superficially friendly."

Despite the alleged improvement to the relationship, Davidson County Assistant District Attorney Greg Brown alluded to other problems that existed between Ms Martens-Corbett and her husband.

The prosecutor said concern arose over whether Mr Corbett would return to the United States from Ireland with his children after he was scheduled to go home for his father’s 80th birthday party.

Prosecutors also said a life insurance policy stood to pay out more than $600,000 in the death of Mr Corbett.

Mr Martens said he was aware of the policy, but did not recall the amount until last week.

Closing arguments are expected to begin once a decision is reached by Judge Lee regarding instructions to jurors.