Factual error: We see Donna's driver's license, the expiration date is wrong. Driver's licenses expire on the person's birthday, not the issue date. Plus, in Wyoming they're valid for 4 years and hers is only valid for 3 years.
Longmire (2012)
1 factual error in A Fog That Won't Lift - chronological order
Starring: Lou Diamond Phillips, Robert Taylor, Katee Sackhoff, Bailey Chase
Revealing mistake: Early in the episode the dead body in the barn ever so briefly flutters his eyelids.
Omar: That's the great thing about the compound bow, a great equalizer. A little bit of practice, even a girl can make that shot.
More trivia for Longmire
What Happens on the Rez... - S4-E10
Question: When Walt plays the piano, is he playing a real song, or just something he made up (i.e. it was incidental music written for the scene)?
Answer: Something he made up.