Word is that Pete did not want to move his family after all these years in New Orleans. He had been offered OC interviews over the years but always turned them down because he was happy here and happy in the situation he was in.
He basically just wanted a job on DAs staff so he could keep his family here. And, I don't think it's that he didn't want the OC job, it's that DA wanted another OC and Pete was willing to wait around in hopes that he could keep his family here. DA tried to get other OCs but could not get the guys he wanted. So he went back to Pete to offer him the OC job. Probably don't want to hire your OC by default. But at least they targeted, went after and got Kubiak this year.