Having relocated to Los Angeles with his then girlfriend Deborah King, later Deborah Santana (wife of Carlos Santana from 1973 until filing for divorce in 2007), Stone's behavior became increasingly erratic. Epic was anticipating new material in 1970, but with none forthcoming, finally released "Greatest Hits" that November. One year later, the band's fifth album, "There's a Riot Goin' On", was released. "Riot" featured a much darker sound as most tracks were recorded with overdubbing as opposed to the Family Stone all playing at the same time as they had done previously. Stone played most of the parts himself and performed more of the lead vocals than usual. This was the first major label album to feature a drum machine.