Powerful documentary on the death of 43 Mexican students - though a little rough going for most US viewers

The two episode documentary series The 43, on Netflix, presents a vivid account of the horrendous, criminal slaughter of 43 Mexican students that took place in 2014 in a central Mexican city unfamiliar to me. The documentary re-creates as best as possible the scene of the slaughter and follows through with an account of the tepid official investigation, the more detailed investigation, far too late, by an international forensic team, and the ongoing protests and memorial services for the students. As the documentary shows, the students were no angels - they literally hijacked several inter-city buses for transportation to a demonstration (where or what about I'm not sure), but the police reaction to these hijackings went so far beyond the pale as to be not only horrific but also puzzling; the police could easily have taken control of the buses, arrested the students, and sent them on their way - there was no apparent reason to kill dozens of students, incinerate the bodies (as we later learn), and dump the ashes on a landfill. So the series follows up on several theories, none proven, about the involvement of the government at the highest level and of course international drug dealers. Overall, the series is powerful and graphic, but it certainly gets repetitive and could have been stronger if more concise. Most US viewers will probably, like me, be puzzled by many of the topical references, and for non-Spanish speakers this show is a little difficult, as so much is told through interviews that require lots of subtitle reading.