Arno Conklin was a District Attorney in Los Angeles. In 1953, he successfully prosecuted a woman who had poisoned both of her parents, asking for and receiving the death penalty against the killer. By the mid-1950s, Conklin had ascended to the position of Senior Deputy District Attorney, and by the late-1950s, he had become an Assistant District Attorney. In the mid-1960s, Conklin hired Roger Goff as a prosecutor.