[1] He was born in New York City in 1831 and educated at Columbia University.
Several years after his admission to New York City Bar Association, he partnered with Judge William G. Choate to form the law firm of Shipman, Larocque & Choate, where he practiced until his retirement in 1899.
He also served on the boards of a number of New York City institutions, including the Metropolitan Museum of Art, the Century Club, and Columbia University.
Larocque was active in reform politics, serving as president of the New York City Bar Association from 1894 to 1895 and as chairman of the pro-Temperance Committee of Fifty in 1894.
[2] Diana Rivers is his granddaughter through his daughter, Elizabeth Larocque.