SEVEN OAKS (CBSLA.com) — The cabin quadruple-murder suspect Christopher Dorner is believed to be holed up in is now fully engulfed in flames, according to CBS2′s Carter Evans, who also reported that tear gas was fired into the house before the fire broke out.A shot was also fired around that time, and sources tell CBS2′s Juan Fernandez that tracks were found leading to a horse corral, which may mean Dorner was able to escape.LAPD Cmdr. Andy Smith Tuesday urged Dorner to turn himself in as a gun battle and barricade situation raged on in San Bernardino County.“Enough is enough. It’s time...