Michael Connelly wanted Matthew McConaughey for the role of Mickey based on his performance in Tropic Thunder (2008).
Mick Haller, in the Connelly novels' universe, is the half brother of Harry Bosch.
In "The Crossing" (2015), a Bosch novel by Michael Connelly that also features Haller, it's remarked that "He [Mick Haller] had received the ultimate imprimatur of L.A. acceptance - a movie about one of his cases starring no less than Matthew McConaughey." Furthermore, Haller was also asked by a reporter "if he had been in touch with Matthew McConaughey and if there would be a sequel to the Lincoln Lawyer film. Haller said he didn't know."