Murder charges are filed in Douglas County against a man accused in a quadruple murder in Douglas County. The Douglas County DA filed two counts of murder against Wilber Martinez-Guzman for the 2019 killings of Connie Koontz and Sophia Renken in Douglas County. Martinez-Guzman will face separate murder charges in Washoe County for the killings of Gerald and Sharon David following a state Supreme Court ruling that required the cases to be tried separately.