New information alleges both the accused admitted to hitting Mr Corbett
A 911 call made in the US by the father-in-law of Limerick man Jason Corbett has been released.
65-year-old Thomas Martens and his daughter Molly Martens-Corbett have been charged with Mr Corbett's murder.
The two have been released on bail after appearing in court.
Mr Corbett died at the age of 39, after an alleged dispute at his home in North Carolina last August.
No date has yet been set for their trial and they have said they will plead not guilty, claiming self-defence.
In a call made to police, Mr Martens says he intervened in a fight between his daughter and Mr Corbett.
While newly-released information from the district attorney Garry Frank alleges that both the accused admitted to hitting Mr Corbett with a baseball bat and a concrete paving brick.
Detectives also said the scene that they found in the Corbett house was not consistent with an uncontrolled fight, as the Martens claimed took place.
There is also some evidence that large sums of money may have been taken from the couple's joint bank account since Mr Corbett's death.
Catherine Fegan is the chief correspondent with the Irish Daily Mail.
She told Newstalk Breakfast a lot of weight is expected to be added by the autopsy report.