Career
He was the founding chief of the National Indian Brotherhood in 1968, which is today known as the Assembly of First Nations. Dieter was a Cree, born on the Peepeekisis Reserve near Balcarres, Saskatchewan. He enlisted with the Royal Canadian Air Force during the Second World War but was turned away due to his tuberculosis.
He became the Regina Friendship Centre"s first aboriginal president
In 1966, he became head of the Federation of Saskatchewan Indian Nations and served in that role until 1968. He died of cancer in Regina and was buried on the Okanese Reserve.