J. Michael "Mickey" Haller, Sr. (d. 1970) was the father of Harry Bosch and Mickey Haller, and the grandfather of Maddie Bosch and Hayley Haller. He was a famous criminal defense attorney, a registered Democrat, and a resident of Canon Drive in Beverly Hills. He had many high profile clients. Several years after the birth of Hieronymus, Haller had another child as a result of an extramarital affair. He divorced his wife and two months later married a B-level Mexican movie starlet. Five months after the wedding, J. Michael Haller, Jr. was born. Haller Sr. died when Jr. was only five years old.