Seems a lot was kept out of the book. As you said Martoranos brother as a criminal is barely mentioned. But I was reading it thinking why is he in prison.
Also didn't get that Johnny Martorano was on the lam for 20 years but he was only looking at 3---4 year sentence. Why bother ?
They kept him out to keep the Mob at bay...had he went to prison, the mob would have murdered Bulger and Flemmi