biographical data

Gary Francis Poste biography: 13 things about Groveland, California man


Gary Francis Poste was a white man from California, United States. Here are 13 more things about him:

Gary Francis Poste (©Tuolumne County Sheriff's Department)
Gary Francis Poste (©Tuolumne County Sheriff’s Department)
  1. He lived in Groveland, Tuolumne County, California. (a)
  2. He had blue eyes. (a)
  3. He was friends with his fellow California resident Glynn Barnes. Together, they hiked up Mount Haystack in the Adirondack Mountains of New York, USA and the Upper Twin Lake in Wisconsin, USA. (b)
  4. He weighed 175 lbs. (a)
  5. In 1962, he left the military, according to an independent team of 40 investigators called The Case Breakers. (c)(d)(e)
  6. In 1963, he became a housepainter, a job that he held for more than 40 years, according to The Case Breakers. (c)
  7. He was an Air Force veteran when he received medical check-ups for a gun incident at a hospital located 15 minutes away from the scene in Riverside, California where Cheri Jo Bates was killed on October 31, 1966, according to The Case Breakers. She was his sixth murder victim, the team claimed. (c)(d)(e)
  8. He was married to Mary Poste. In the 1970s, he and Mary babysat their neighbors’ child named Gwennie. In 2021, Gwennie said she believes he is the Zodiac Killer, who was never caught after allegedly killing five people in the San Francisco Bay Area in California between December 1968 and October 1969. (c)(e)(f)
  9. He has a son who was married to Michelle R. Wynn for 10 years. His son and Wynn have a son, who was born in the 1980s. (c)(g)
  10. On February 22, 2016, he was arrested and accused of assaulting and seriously injuring Mary in their Groveland home. On February 24, 2016, he was charged with one count of corporal injury to a spouse and another of elder or dependent adult abuse. When he was found mentally incompetent to stand trial, he was referred to  the California State Hospital in Napa, Napa County, California and was later placed under a mental health conservatorship. (a)(f)
  11. He suffered from hypertension, osteoporosis, hypothyroidism and atrial fibrillation. On August 23, 2018, he died in Groveland from sepsis, septic shock, dysphagia and vascular dementia. (c)
  12. He died at the age of 80. His remains were scattered in the Sierra Mountains. (a)(b)
  13. On October 6, 2021, The Case Breakers provided details that explain why he is possibly the Zodiac Killer. (c)(d)(e)




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