Prosecutors in California are charging a suspected arsonist with the murder of five people who died of heart attacks during a 2003 wildfire. The move could signal a tough new standard for arson cases in a region often plagued by fires. Six men died of a heart attack during the blaze that surged through the San Bernardino Mountain foothills. And with evidence that stress from the wildfire led to five of the deaths, prosecutors took the step this week of charging Rickie Lee Fowler with five counts of first-degree murder.