EUGENE — An arsonist who avoided federal prison five years ago by helping lock up Earth Liberation Front activists is headed to state prison for selling heroin. ... He was on probation under a 2007 plea deal for his role in arsons by an ELF band known as The Family. Targets included a meat-packing company, car dealership, ranger station and lumber company. Ferguson is depicted as the leader of the group in the documentary "If A Tree Falls." He faces a probation revocation hearing July 14 in federal court.