I saw the presser that the Pima County sheriff, Clarence Dupnik, gave and it was disgusting. He must have blamed talk radio and mean rhetoric at least 3 or 4 times if not more. He started and ended the press conference with this opinion.
I doubt this 22 yr old murderer listens to talk radio, his radicalism probably comes from professors, trash music and MSNBC. There, I can have opinions too and neither of us knows the real story.