Here he is--Tucson's Speedway stud and a juke joint Don Juan, a twenty three year old thrillkiller, Charles Schmid, a familiar figure with his hypnotic eyes, white lipstick, sexual swagger. Briefly, he stoned to death fifteen year old Aileen Rowe, her ivory chiffon hair done up in curlers, admitted to the crime two days later to some of his acolytes. A few months later he killed the two youngsters of a prominent cardiologist who hadn't been paying too much attention to the heart trouble of the older girl--Gretchen--who had had an abrasive thing going with Schmid. Still months later his former friend, Richard Bruns, finally ""blew the whistle"" on him and this led to the double trial--Coppolino and Sheppard's battling Bailey as defense lawyer....Life and L.A. Times staffers have collaborated on this rerun of a case as hard to understand as many of the contemporary phenomena which produced Charles Schmid--Playboy magazines and Presley records. And over and above its honkytonk horror, it has a Boston Strangler-hold.