There was a hole
In the middle of the ground
The prettiest hole
That you ever did see
And the green grass grows all around all around
And the green grass grows all around
And in this hole...
For people that read the books that the characters are based on, there is no excuse.
Now for the rest of us, that have no book reference, we get a pretty standard detective formula movie. It does have a few layers. All kinds of people could have done all kinds of despicable deeds. Even the good guys are not kosher in thoughts and deeds. Of course, there is the possibility that it is the last person you would suspect.
This presentation was made for TV and maybe a pilot for a series that never got off the ground.
If you like detective shows this is worth watching.