Douglas County sheriff’s deputies say an Oakland man who mistakenly believed he had a warrant for his arrest took them on a high-speed chase today before losing control, driving off a cliff and landing in the North Umpqua River. Jonathan Eli Moore, 28, was found about 50 feet down river from his vehicle, hiding under a wad of tree roots in the current, sheriff’s spokesman Dwes Hutson said. Moore complained of being extremely cold and was treated at the scene by paramedics, Hutson said. At about 12:19 a.m., Deputy Nathan Goodman attempted to pull over a 1997 Toyota Corolla traveling …