>> reporter: and there was more. paul showed detective psalm texts he received from peter sent from the very rice field where roberto was killed. >> and that text was dated and timed the day before. >> announcer: the focus shifts from the nuts and bolts of electrical explosions to an explosive personality. coming up. >> why did you hate him? >> he was arrogant. he flaunted stuff in my face. >> pete had a reputation for being a real hot head. without hardly any effort, pete could piss you off. >> when family business continues. ff. >> when family business continues. guy who did good. after building a business that created thousands of jobs he took charge of a city still reeling from 9/11 a three-term mayor who helped bring it back from the ashes bringing jobs and thousands of affordable housing units with it. after witnessing the terrible toll of gun violence... he helped create a movement to protect families across america. and stood up to the coal lobby and this administration