dynamic to hear how these two were able to do what they did to gain supremacy back in the late '60s, early '70s in terms of taking over the streets of boston. >> deb, the jurors heard from another interesting witness, right? >> reporter: absolutely. this was the bookmaker. this was whitey bulger's bookmaker. it was so interesting. because it really looked like the two men had almost a fondness for one another. as court began today, they smiled at one another. they had been through a lot together. but as the testimony wore on, the bookmaker was very flustered. he was questioned repeatedly on cross-examination. had a hard time coming up with dates. hard time coming up with certain situations. but there were certain key points in terms of his relationship with whitey bulger that there was no doubt, no doubt about whitey bulger extorting money, having him pay rent, and about a partner instilling such fear in these people that they really controlled -- this is how they were able to conduct their reign of terror, don. >> deborah feyerick in boston.