Citizen Warrior - The 4th Branch (Citizen Warrior Series)

At a hectic Tucson mall on Black Friday, aging entrepreneur Carter Thompson saves the life of retired Delta Force Colonel Doug Redman and his family from a vicious terrorist attack. Soon, they learn of an elderly couple in southeastern Arizona, terrorized by a Mexican cartel and ignored by the authorities. Digging deeper, the two men decide to investigate—only to uncover a sinister connection between the cartel and Islamic terrorists. When their pleas to unbelieving government agencies go unheard, they must decide: stay on the straight-and-narrow, or go outside the law and put their lives on the line to protect the innocent—and even to save America.