BY THE OREGONIAN/OREGONLIVE (Compiled from news accounts, court records, public notices) Last week's arrest of a long-sought accused eco-saboteur pushed the spotlight back on a tight-knit cell of radical environmentalists responsible for a $48 million run of firebombings and other crimes across the West in the 1990s and early 2000s. Six men and five women prosecuted in Oregon received sentences ranging from three years to 13 years. They were arrested starting in 2005 in what the FBI called "Operation Backfire," a task force that tracked down the suspects with the help of an informant deep within the underground group....