May 10, 2018: Part 4 of Back to Brushy Mountain describes the incredible violence in the 1970s and 1980s with a first-hand account from former inmate Robert Gibson. Gibson was incarcerated for killing a man in 1976. As a prisoner, he was part of a group that took guards hostage and fatally shot rival inmates in their cells in 1982. See the full articles for the WBIR series at this link: http://bit.ly/BackToBrushyMountain More stories, here: https://www.wbir.com/ Subscribe to WBIR for exclusive content: https://www.youtube.com/c/WBIR10 WBIR Channel 10 in Knoxville, Tennessee produces award-winning, community-centered content "Straight From The Heart" of East Tennessee. We strive to be good citizens, to do what is right, and to be fair and honest. We care. Follow WBIR on Social: Facebook: https://www.facebook.com/WBIRChannel10 Twitter: https://twitter.com/wbir Instagram: https://www.instagram.com/wbirchannel10/