Complex sentence: Thus the town was saved by this unknown volunteer who later on was identified as Igwal, an Ilonggo from Panay island, the most feared "boyong", and an escapee.
Split into simpler sentences: Thus the town was saved by this unknown volunteer who later on unmasked his identity. He was Igwal, an Ilonggo from Panay island, the most feared "boyong", and an escapee.