By Drew Griffin and David Fitzpatrick
CNN Special Investigations
Erie, Pa. — The image remains chilling nearly eight years later: a pizza deliveryman sitting cross-legged on the pavement with a homemade bomb clamped around his neck, surrounded by nervous police who crouch behind their cars.
"Why isn't anybody trying to get this thing off me?" he shouts to the dozens of officers nearby.
But before a bomb squad can arrive, the device goes off, killing 46-year-old Brian Wells.
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