Born in Santa Barbara, California, Mr. Hollbrook attended the University of California at Irvine,then attended Loyola Law School in Los Angeles, where he was editor of the International Law Review. He received his J.D. and passed the California Bar Examination in 2003. After he worked as a civil defense attorney, Mr. Hollbrook made the switch to criminal defense and started work with the Kroger Law Group in November 2005.

A member of the American Bar Association, Los Angeles Bar Association and the American Civil Liberties Association, he is also a member of the International Criminal Law Association.