I've only watched one episode, but I learned all I need to know about the veracity of this show (Season 1, Episode 2 about the murder of Mary Yoder.)
During an interview Ms. Morgan conducts, someone who is convinced that there's a wrongful conviction in this case says that Mary's husband refused to allow an autopsy. This is absolutely false, and it would have been so simple to verify. Despite all of the protestations of innocence, Ms. Morgan never brings up facts that are known about the case, such as texts that show the convicted is not exactly the innocent, loving girl her supporters portray her as, nor that her DNA was found on the vial of poison. It's clear that Ms. Morgan is not invested in presenting both sides of the story.
This series is not genuine journalism in any way, so skip it if you're looking for real deep-dives into crime.