Edwin; I dug out my copy of Midnight Riders and gleaned the following from a quick scan.
Apparently, some time in late 1980 or early 1981, not too long after the band had been reformed after a long break up and the demise of Capricorn, Jaimoe was fired in a dispute over financial matters and replaced with David Frankie Toler. However, this period didn't last very long and was followed by an even longer breakup in the mid '80s.