The first wave of slayings haunted Los Angeles in the mid-1970s. The killer slipped mostly unseen through the night, preying on older women who lived alone. He raped them and squeezed their necks until they passed out or died. On the 17 who were killed, he placed pillows or blankets over their faces. The second wave hit a decade later in Claremont -- five older women raped and strangled, faces again covered. Even with at least 20 survivors, police never connected the two homicide-and-rape rampages nor solved either of them. The victims gave conflicting descriptions of the rapist, police in...