Molly Martens and her father Thomas Martens have been found guilty of the second degree murder of Irishman Jason Corbett.
The jury of nine women and three men delivered a verdict in a courtroom in North Carolina after a three week trial.
They had both denied the second degree murder of dad of two Jason two years ago.
The two of them had claimed self defence during the trial.
Jason Corbett was found at his home in North Carolina on August 2, 2015 after he sustained fatal head injuries.
Evidence during the trial had shown that Mr Corbett had received at least ten blows to the head from a baseball bat and cement brick.
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