Complex sentence: Charles Boko Freeman became the PPII/Black Panther Party Chairman in Houston and the Party kept their community organizing until membership dropped in late 1974 and early 1975 due to constant police repression.
Split into simpler sentences: Charles Boko Freeman became the PPII/local Black Panther Party Chairman. Party activity continued until membership dropped in late 1974 and early 1975 due to constant police repression.