DALLAS (AP) – The Dallas Police Department has thrown out the results of a promotion exam after discovering late last year that a police major who had helped shape the test had a test-prep business on the side. The Dallas Morning News reports that the city’s civil service board agreed Tuesday with a decision to void the tests taken in November because of the concerns raised by Maj. LaToya Porter’s involvement. About a dozen officers paid for tutoring through the test-prep company, which investigators said used scenarios that were similar to ones that appeared on the test Porter had helped craft. The exam results were to be used for the purpose of determining the order of promotions. An internal affairs investigation into Porter’s actions remains open.