 WMBC's frequency changed to 1230 in 1927 and to 1420 in 1930.WMBC was an early outlet for religious programming and gospel music in Detroit, but was probably most famous as the home of conservative radio commentator Jerry Buckley, who was shot dead in the lobby of the LaSalle Hotel in 1930 after successfully campaigning for a mayoral recall election in which then-mayor Charles Bowles lost.WMBC's call letters were changed to WJLB in 1939 after the station was acquired by John Lord Booth (who renamed the station for himself), and in 1941 the station settled on its current home of 1400 kHz.