Incendiary: The Willingham Case

Rough around the edges but better for it. Dumbs down neither the science nor the legal/political wrangling. Many long, complex, interesting scenes and monologues. The late Dr. Gerald Hurst was a great interview and a fascinating man: scientist disgusted with his trailblazing work with weapons so quits and uses the royalties from his inventions to fly wherever testifying pro bono against bogus science. Make sure to read David Grann's article "Trial by Fire" as well (you can skip Zwick's movie).