Population Zero

https://www.vudu.com/[…]

This documentary was much like a normal movie in that you had a mystery that you were trying to figure out. The constitutional loophole that would allow a murderer to walk free was intriguing, but then going to the next step to track down the murderer and hear why he did it was eyeopening.

Currently, this is available to watch free (with ads) on Vudu.com.