deborah feyerick takes you inside one of the biggest manhunts in fbi history. the church bells of saint monica, near the harbor in south boston, have sounded for generations of irish immigrants. it's a tight-knit community that has always protected its own. a place james "whitey" bulger, one of boston's most notorious gangsters, called home. bulger learned to fight and survive on the mean streets of south boston, known as southie to locals like john shay who decades later would work for bulger. >> the guy was legendary. >> he made tough guys shake. he made them shake. >> reporter: ...