Clark Public Utilities interview questions

I applied mid January and got my first interview early February. Standard panel interview with 4 people and around 6 questions focused on your work experience and background. The interview was enjoyable and conversational. I had time afterwards to ask questions and they told me what the hiring timeline would be. I received a rejection letter about 3 days later. I appreciated the prompt decision but feel that they may have already had someone in mind for the position by the time I got the chance to interview.