In 1998, "the Family," whose members included Rebecca Rubin, left, set fire to a ski resort in Vail, Colo., causing more than $24 million in damage. L. to R.: AP; FBI

A woman accused of helping to carry out firebombings in support of a radical environmentalist agenda pleaded guilty Thursday to arson and conspiracy charges in federal court. Her plea was the latest admission of wrongdoing by members of "the Family" in a series of arsons across three U.S. Western states from 1996 to 2001 that caused $40 million in damage.

Now a decade removed from her membership in the radical group, Rebecca Rubin, a Canadian citizen, consented to serve at least five years in prison. She will be sentenced on Jan. 27.

The group fell apart after federal investigators, working under the aegis of Operation Backfire, used a former member's drug habit to turn him into an informant against his partners in crime. Ten people pleaded guilty in 2007 to conspiracy and arson charges and were sentenced to prison. Rubin and two others (who remain at large) evaded police.



Rubin's attorney, Richard Troberman, described her seven years on the run as "a prison without walls."

Assistant U.S. Attorney Steven Peifer laid out the factual basis for the charges against her, beginning with the freeing of wild horses from a federal horse-slaughter facility in Oregon in 1997. Other members of the group planted incendiary devices — the indictment doesn't specify the type of devices — that razed the facility.

Peifer then described a December 1998 incident in which Rubin helped ferry equipment for an attempted arson at a U.S. Forest Industries building in Oregon, and another incident that year when she helped prepare for an arson at a Colorado ski resort. Neither attempt worked, but both buildings were later burned in separate environmentally motivated fires.

In the final act for which she is charged, Rubin freed horses at a federal wild horse facility in California before other members of the group set a barn on fire.