I finished "The Vanishing at the Cecil Hotel". The fourth episode is by far the most interesting, because it starts looking at the case (which was ultimately a sad, freak accident) from the angle of how the death was investigated, especially online. It becomes clear that people online wanted there to be a murder and, when the evidence showed that there wasn't one, just claimed that the police and coroner were part of a bigger conspiracy. And that ended up with an innocent man, who was in a different country at the time of the death, being accused of murder and attempting suicide.
The documentary wants to have its cake and eat it: it makes these points but only after it's done the salacious stuff. I won't go any further, but let's just say that this online conspiracy-finding mentality has ended up with millions of people in the "queue" to jump down the crazy rabbit hole. That, rather than whether someone was killed by ghosts, is genuinely disturbing. Ultimately a well-made programme, but not one I can recommend.