LAS VEGAS (KLAS) -- A 30-year-old Arizona man faces a first-degree murder charge after a Saturday night stabbing in Bullhead City. Records show Don Earl Kelso is in custody in the Mohave County jail after his uncle was found with critical stab wounds in the 1800 block of Ramar Road when police responded to a report of a weapons offense. Kelso wasn't at the scene when police arrived, but Fort Mojave tribal police found him walking near King Stree…