THE shotgun used to kill Marion Millican was thrown into a ditch afterwards, Antrim Crown Court has heard.
Fred McClenaghan, 49, from Magherafelt, denies murdering his former lover at the Portstewart launderette where she worked.
He claims the gun went off accidentally during a struggle.
On Monday, his trial heard from the older sister of a woman with whom Mr McClenaghan once had a relationship.
Sheila Donnelly said Mr McClenaghan had come to her workplace on 11 March and looked shaken.
She said he told her: “I have shot a girl” and when she asked him to explain what had happened, he just said: “I have shot a girl in Portstewart.”
Ms Donnelly said Mr McClengahan said he had wanted to speak to Ms Millican with whom he had been having a relationship.
He said he had gone to the Portstewart launderette with a gun and there was a struggle during which the gun went off.
Ms Donnelly said that Mr McClenaghan knew the police would be coming for him and said he was willing to go to Portrush police station.
When the police arrived, she said he would not be searched. She said he had once told her that he had been abused as a child by a police officer.
She said she asked several times where the gun was, but he could only tell her that he threw it into a ditch.
The trial continues.