Background
Northcroft was born in Hokitika, New Zealand.
Northcroft was born in Hokitika, New Zealand.
He attended Auckland University College and began his law practice in Hamilton.
The same year he returned to New Zealand, resumed his law practice and joined an Auckland law firm in 1923. From 1927 to 1933, Northcroft was a deputy judge advocate general in the New Zealand Army and from 1933 to 1935 was a Judge Advocate General. He was awarded the King George V Silver Jubilee Medal in 1935.
Also in 1935, Northcroft was appointed a judge of the Supreme Court of New Zealand at Christchurch, a superior trial court.He was styled "The Honourable Mr Justice Northcroft.
After the Second World War, Northcroft was appointed as the New Zealand judge on the International Military Tribunal for the Far East in Tokyo. After returning from Japan, he resumed sitting as a Supreme Court judge, and occasionally sat as a judge of the New Zealand Court of Appeal.
Northcroft died in Christchurch. After his death his papers went to the Justice Erima Harvey Northcroft Tokyo War Crimes Trial Collection at the University of Canterbury, which was added to the United Nations Educational, Scientific and Cultural Organization Memory of the World Register.
In 1912, Northcroft was a founding member of the Hamilton District Law Society and later became its president