In one of the case studies in the textbook, Rita Mae King was a purchasing agent at an electronics and appliance chain. She frequently worked with travel vendors and managed to put Spicewood Travel on the top of the preferred vendor list. Upon investigation, the fraud examiners discovered that she ran her own travel agency out of her office at the store and receive kickbacks from Spicewood Travel in return for having her company use them to book trips. What triggered the investigation of Rita Mae King's activities?