Douglas County District Attorney Mark Jackson filed murder charges Monday against the man accused in the murders of four people spanning two different northern Nevada counties. Previously, Douglas County and Washoe County prosecutors had sought to try Wilber Martinez Guzman in Reno for the January 2019 murders of Connie Koontz and Sophia Renken in Douglas County and Gerald and Sharon David in Washoe County. A split decision ruling by the Nevada Supreme Court, however, will require Martinez Guzman to be tried separately in the two counties.