Pretty, Pretty Dresses - S3-E9
Continuity mistake: When Bobby is serving his parents breakfast, the tray he's holding has two eggs on it and Peggy's plate is empty. After Hank finishes talking, we see all three of them and there are now two eggs on Peggy's plate and a third one on the tray. (00:03:30 - 00:04:05)
Answer: Jeffrey Boomhauer is a Texas Ranger as can be seen in the final episode at the end when he sets his wallet down, it flips open revealing a Texas Ranger badge.