Brian Kearney told gardaí he tried to open his wife's bedroom door the morning her body was found but could not because it was locked.
Mr Kearney denies murdering his wife Siobhan at their home in Goatstown in Dublin in February 2006.
Details of a statement made by Mr Kearney and his subsequent arrest one day later were revealed to the Court today.
Det Sgt Michael Gibbons told the Court that Brian Kearney through a locked door had told his wife he was leaving for work.
He got no response and left his three-year-old son watching television as he went to collect an order for his business at the Sandyford Industrial Estate.
Mr Kearney returned to the house after his wife's body was discovered in the bedroom by her father.
Mr Kearney asked gardaí if they would want the clothes he was wearing.
The court later heard that when detectives called to Brian Kearney's mothers house to collect the clothes they had been washed.
During questioning after his arrest, Mr Kearney told gardaí he accepted his wife died in the house when only he, she and their son were there.
He told officers he could not believe she was murdered.
In an earlier statement Mr Kearney described seeing his wife dead on the floor of her bedroom.
He said, 'What I saw had me in shock, that beautiful face, those patches on her body.'
Separation proceedings
Earlier today, the Court heard that Siobhan Kearney had instructed her solicitor to begin separation proceedings.
Hugh Hannigan, a solicitor with Simon McAleese Solicitors in Dublin, told the court that in February 2006 he had sent two letters to Mr Kearney indicating that Siobhan wanted a separation.
Mr Hannigan said that in the letters Siobhan Kearney expressed a view that she was concerned about the impact of the separation on their three-year-old son.
Ms Kearney met her solicitor at the end of January 2006 and formally instructed him to proceed with the separation.
The court heard that two letters sent on the 3 and 14 February had not been replied to by Mr Kearney.
The Trial resumes in the morning.
