The Progressive National Baptist Convention, Incorporated
(PNBC) is a convention of African-American Baptists
emphasizing civil rights and social justice.

It formed in 1961 after civil-rights-oriented Baptist
ministers, led by Martin Luther King, Jr. failed to replace
Joseph H. Jackson, the long-time head of the National Baptist
Convention (NBCUSA). The older group stood aloof from the
Civil Rights Movement that was often led by local Baptist
ministers. The dissidents nominated Gardner Taylor as
president of the NBCUSA.[1] After an hour-long fist fight
between reformers and standpatters, in which one eminent
elderly minister was accidentally killed, Jackson's supporters
won. King was purged from the NBCUSA and his goal of using the
united power of the black Baptist community to promote civil
rights came to nothing. His defeat prompted the formation of
the new group.[2]

https://books.google.com/books?id=SLMDAAAAMBAJ&lpg=PA16&ots=CcaFmyX_Ei&dq=rev%20arthur%20g%20wright%20death&pg=PA16#v=onepage&q=rev%20arthur%20g%20wright%20death&f=false

Folks made a flying wedge and bum rushed the stage, a minister
fell off and died, and an HOUR LONG fistfight broke out broken
up by 80 cops with nightsticks...