The hardest part about this case to me is after reading a few of the books on the Zodiac and watching the movie was the fact that the various police officers seem to miss glaring details. Albeit we have much more sophisticated methods for tracking serial killers now with FBI profilers, and the assistance of technology, but the Zodiac acted in such brazen fashion that it blows me away that he never got caught. The SoundCloud podcast did indeed raise some eyebrows, but in this field circumstances aren't enough. That guy was a bad dude for sure but I don't know if the look he had...which was a fairly common style was enough to pin it on him. Ever since I started reading about the Zodiac, I was convinced it was more than one killer. Possibly a tandem where the killers worked together to avoid capture. Definitely a military or some sort of maritime experience as the knots are pretty legit...and I think there is a good chance he had a family based on a lot of the sociopathic things I've seen in my career. For him to go under the radar for so long, he had to have lived a double life that deterred detection. I would safely bet he was involved in a local church and acted polar opposite as his killer persona. Just my experience playing into it but such an interesting case.