McKesson & Robbins was a company at the centre of a famous fraud in the United States

Question:

McKesson & Robbins was a company at the centre of a famous fraud in the United States in the 1930s.
Required
(a) Research the facts of the McKesson & Robbins fraud and write a short description of the case.
(b) Make a list of the defects in the company's system of internal controls that are relevant to the fraud and suggest audit tests that would have revealed these problems.