Fraud Examination 4th Edition by Steve Albrecht,Chad Albrecht,Conan Albrecht ,Mark Zimbelman

Exercise 19

As the lead accountant for a small company, you notice that inventory purchases from a certain vendor have increased dramatically over the past few months, while purchases from all other vendors have decreased. You suspect that something may not be right and that there may be a fraudulent relationship between someone in your company and the vendor that is getting increased business.
1. Which method(s) would you use to investigate your suspicions