Source material is not right fit for A Movie

Rating: Null/10 (28 July 2018)

Really, I loved the book. But the way it was written, it was hard to in-corporate it into 120 min movie as there are almost 15 characters. Now with time-constrains movie was able to focus on only few characters or moments and even the last revelation seemed way forced. For someone who have not read the book, the movie is gonna seem very odd.
If it could have been a mini-series each episode focusing on 2 characters interrogation like in book, it could have hit the Homerun.
Though, is it still too late? HBO, Showtime, Lifetime?
Awesome cinematography btw