The Westco Plumbing Services Company serves the Miami metropolitan area. It has 24 plumbers on staff, each with his or her own company truck. Each truck is fully equipped, and all plumbers take their trucks home at night, as Westco provides 24- hour emergency services. Barbara Westco is the company’s controller. She has heard rumors that some of the plumbers are using the company trucks to conduct their own business on the side.

Required
a. Formulate a fraud theory relating to the rumors.
b. Formulate a plan for collecting evidence to test the fraud theory.