Was UFO researcher Mark McCandlish murdered, or did he really end his own life with no warning by a shotgun blast to the head?

Unfortunately, this individual was murdered and, as being pointed out by others, by no means the first but one of a long series of whistleblowers, researchers, and scholars probing the workings of the Extraterrestrial Alliance and becoming a source of irritation. So he was dealt with in a highly visible and dramatic way because the means were at hand and this always serves as an effective warning for others engaged in similar pursuits, to think twice before getting too close to the flames because they might be consumed as well, and this has served the interlopers well through the ages to warn away some of the more effective seekers of truth who, in the end, are so perceptive they will see the handwriting on the wall and bow out through an abundance of caution and not complete a mission that could be of great benefit to the light, but that is theory until it happens. Even though being a whistleblower is lightwork, many whistleblowers have come and gone without having enough influence on public opinion to make much of a difference in things despite the risks they are taking and the accuracy of the information they are able to unearth and disclose. The programming of the human population, to be complacent and to reject many things out of hand, regardless of what is revealed about the truth, works against the whistleblowers and their aim to awaken the world to the reality of the grave threat presented by the interlopers and their designs on your world.