Gardai say they are yet to establish a motive into the suspected murder suicide, which has left three people dead in North Kerry.
The bodies of 24-year-old Jamie O'Sullivan and his 56 year old mother Eileen, were found inside the home in the town of Lixnaw on Wednesday.
While Eileen's partner, 63-year-old Mossie, was found in a nearby field with a shotgun recovered close to his body,
The bodies were removed to University Hospital Kerry, where post-mortem examinations are due to take place.