A 40-year-old man has gone on trial accused of murdering his baby son in Co Mayo.
John Tighe, of Lavallyroe in Ballyhaunis, denies murdering six-and-a-half month old Joshua and says what happened was a 'pure accident'.
In his opening speech, the prosecuting barrister told the jury told baby Joshua Sussbier Tighe was born in November 2012.
By the following June, his parents John and Natasha's relationship ran into difficulty, and they no longer lived together.
On May 31st, Natasha posted on Facebook about a new relationship - and that day the accused John Tighe collected Joshua and brought him to his house.
The next day he rang a medical practice and said he had been changing the baby's nappy and had gone to the toilet.
When he came back he thought the baby was choking on a baby wipe that he thought he had grabbed.
The jury was told it would be alleged that a post mortem showed baby Joshua died from asphyxiation and there was an egg-shaped wad of tissue in his throat.
The prosecution says it would be alleged a six-and-a-half month old baby is not able to form an object like this with his hands, or of chewing or swallowing something of this size.
The prosecuting barrister said if the baby could not have physically done it, there was only one other person in the house at the time.