A good mystery movie - 'A Dark Place'

Not your typical mystery.

The’hero’ (?) of the story is a ‘slow-witted’ (?) garbage man,
who solves a murder.
Although not highly rated (around 3 out of 5 stars), I really enjoyed it.
I watched it on Prime, but suspect it’s also available elsewhere (Netflix, etc?)

“A Dark Place” (not to be confused with ‘In a Dark Place’)
When a young boy goes missing in a sleepy backwoods town, a local sanitation truck driver, Donald,
plays detective, embarking on a precarious and obsessive investigation.