Conversation so far:
What kind of internal problems was theSly and the Family Stone band having?
Relationships within the band, Sly and the Family Stone were deteriorating; there was friction in particular between the Stone brothers and Larry Graham.
How did Sly and the Family Stone change their direction after having internal problems?
After moving to the Los Angeles area in fall 1969, Sly Stone and his fellow band members became heavy users of illegal drugs, primarily cocaine and PCP.
Was anyone from Sly and the Family Stone arrested for drug use?
In June 1983 in Ft. Meyers, Florida, Sly Stone was arrested on drug possession and entered court-ordered drug rehabilitation in 1983.
Did anyone leave the band Sly and the Family Stone?
In early 1971, drummer Errico became the first to leave the band for other ventures.

Question: When did Gibson join the band?
Self-contained rewrite: When did drummer Gibson join theSly and the Family Stone band?