Gardai will today interview the husband of the woman who killed herself and their two sons in Firhouse in an effort to shed light on why the tragedy happened.
Senior Garda sources last night said their investigation into the apparent double murder and suicide at the Keegan family home at Killakee Walk, Firhouse, had as of yet failed to identify any clear motive.
Officers have already spoken to Brian Keegan informally since the remains of his two sons - Glen (9) and Andrew (5) - and his 41-year-old wife Mary were found at about 11.30am on Monday.
However, detectives are hoping they can speak to Mr Keegan at length as early as today, in the hope that he may be able to shed some light on the events of recent days. He has been comforted by family and friends over the last 48 hours.
Mr Keegan was on a week-long business trip to a trade fair in the United States when his wife and children died at some point over the weekend in a knife attack. He works as an engineer with a Dún Laoghaire lawnmower firm.