the southern poverty law centre (splc), which tracks extremist groups across the us, said that dead leader, robert jay mathews, was killed in a 1984 shoot-out with the fbi on the island, located about 35 miles north of seattle   the southern poverty law centre (splc), which tracks extremist groups across the us, said that dead leader, robert jay mathews, was killed in a 1984 shoot-out with the fbi on the island, located about 35 miles north of seattle

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