HipÓLito Acosta, The Son Of Mexican-American Migrant Workers, Rose To Be One Of The Most Highly Decorated Officers In The U.S. Immigration And Naturalization Service. He Is The Author, With Lisa Pulitzer, Of The Shadow Catcher: A U.S. Agent Infiltrates Mexico'S Deadly Crime Cartels (Atria Books, 2012). He Lives In Houston, Texas. A.J. Irwin'S Career In Law Enforcement Began By Happenstance When He Worked As An Undercover Cop For A Small-Town Georgia Police Department. He Went On To Become A Federal Agent Known For His Quick Wit, Hot Temper, Innovative Ideas And Tenacity, All Focused On Getting The Bad Guy. He Lives In Dallas, Texas.