sentences:  Gibson began his legal studies at the office of George Mingledorff, while he finished a correspondence course from LaSalle Extension University of Chicago, Illinois in preparation for the bar exam.He was admitted to the bar in 1922 and commenced practice in Douglas in 1923.He was an aggressive courtroom lawyer who specialized in cross-examination and was known for his innate ability to sense the mood of the jury and for his colorful and frequently caustic methods of argument.