Betty Lou is a librarian who's not getting the attention she wants and arguably deserves from her police officer husband. He's more interested in his work than her.
There's a murder in their town involving a travelling man who's having an affair with a local married woman.
Betty Lou (with her dog) happens to discover the murder weapon. To gain attention she proclaims herself the murderess. Betty Lou, of red hair, is a sympathetic character and it's fun to see her snub all the interrogating male cops (including her husband) who take her for granted. She also befriends a local prostitute while in jail and otherwise asserts herself as she hasn't before.
It's not all fun, however, for there are some southern Mafia characters about led by a particularly evil man named Bodine (how original). There are a few scenes of gratuitous violence that were a big turn off.
The climax is somewhat improbable but something you might expect in a TV movie.
Also, there's a scene in a country bar where the singers (names unknown) recreate faithfully the great Gram Parsons/Emmylou Harris duet of "Love Hurts."