David Wilcock, known for his appearances on the History Channel's "Ancient Aliens" and other extraterrestrial content creation, has died at age 53. Wilcock was involved in an incident with a police response in Boulder County, Colorado, when he used a weapon and was pronounced dead at the scene. His family expressed hope that his death would encourage increased attention to mental health care access. Additionally, Wilcock created work related to conspiracy theories about world governments and was a prominent personality on YouTube.