When a jury returns to a packed courtroom to announce its verdict in a capital murder case, every noise, even a scraped chair or an opening door, resonates like a high-tension cable snap. Spectators stop rustling in their seats; prosecution and defense lawyers and the accused stiffen into attitudes of wariness; and the judge looks on owlishly. In that atmosphere of heightened expectation the jury entered a Riverside County Superior Court room in southern California to render a decision in the trial of Raymond Oyler, charged with murder for setting the Esperanza Fire of 2006, which killed a five-man Forest Service engine crew sent to fight the blaze.