Background
Costello was born in Dublin, the son of John A. Costello who served as Taoiseach on two occasions.
judge politician Deputy to the Dáil
Costello was born in Dublin, the son of John A. Costello who served as Taoiseach on two occasions.
He was educated at University College Dublin (University College Dublin), and was an auditor of the University College Dublin Law Society.
He stood again in the Dublin South–West constituency at the 1973 general election, and was elected for a final time, to the 20th Dáil. He persuaded the party to publish a document called Towards a Just Society which supported economic planning and more government intervention in the economy. He served in that position until 1977 when he finally left politics to become a High Court judge.
In 1979 he presided over the Costello Inquiry into the Whiddy Island Disaster.
He was appointed President of the High Court in 1994 and retired in 1997. Costello died in 2011.
At the 1951 general election he was elected to Dáil Éireann as a Fine Gael Teachta Dála for the Dublin North–West constituency and was re-elected at every subsequent election until he stood down at the 1969 general election. During the 1960s Fine Gael was out of power and Costello was leader of a new generation of Fine Gael politicians who wanted to move the party to the left. This document went on to define what Fine Gael stood for over the following twenty years.
In 1973 Fine Gael was back in government and Costello was appointed Attorney General under Taoiseach Liam Cosgrave.