Newcastle PD makes good use of Hwy 9, East of I-35. Probably pick up a fair amount of DUI's from folks heading home from OU and Riverwind events. Still, I'd call the PD chief in a heartbeat for an Officer that demonstrated the OP's stated behavior- Carrying his pistol in hand while approaching the vehicle after running all the info and finding no reasons to detain or further engage the driver. Sure, it will be written off as "Officer safety", but if enough people make calls about similar concerns, at some point the supervisors will weigh into it.