Serial Killer Herbert Mullin terrorized the Santa Cruz, California, area at the same time the infamous Co-Ed Killer, Edmund Kemper, was active. Unlike Kemper, Mullin killed anyone. Young, old, men, women, children, and even a priest in a confession booth. He didn't adhere to a particular MO. The deadly voices told him to kill... and he killed. Serial Killer Herbert Mullin terrorized the San Diego, California, area at the same time the infamous Co-Ed Killer, Edmund Kemper, was active. Unlike Kemper, Mullin killed anyone. Young, old, men, women, children, and even a priest in a confession booth. He didn't adhere to a particular MO. The deadly voices told him to kill... and he killed.