Boston gangster story is a tale of 2 brothers (AP)

Former Mass. Senate President William Bulger is escorted from the federal courthouse after the first appearance for his brother James 'Whitey' Bulger and his girlfriend Catherine Greig, in Boston Friday, June 24, 2011. Bulger and Greig were apprehended Thursday, June 23, 2001, in Santa Monica, Calif., after 16 years on the run. (AP Photo/Charles Krupa)AP - It has all the hallmarks of a Greek tragedy: two brothers whose lives diverge radically — one into an underworld of crime, the other into the upper echelons of state politics — yet whose fates remain inextricably linked.