Auna was recognized for his work as a patrol officer in the South Hilo District. In May 2007, he was assigned a series of financial crimes involving the unauthorized use of a stolen credit card number to purchase merchandise over the Internet.

During the course of the investigation, Auna served several subpoenas to various companies on the Mainland and in Hawaii. As a result of the subpoenaed information obtained, he was able to identify a suspect and verify that the merchandise purchased using the stolen credit card number was mailed to the suspect's home.