sentences:  Not long after the 1967 riots, Baraka generated controversy when he went on the radio with a Newark police captain and Anthony Imperiale, a politician and private business owner, and the three of them blamed the riots on "white-led, so-called radical groups" and "Communists and the Trotskyite persons".That same year his second book of jazz criticism, "Black Music", came out.It was a collection of previously published music journalism, including the seminal "Apple Cores" columns from "Down Beat" magazine.