Ed Kemper’s younger sister, Allyn, explained in 1973 why he was nicknamed Guy by members of his family:

“We called him [Kemper] Guy. He had that nickname ever since he was little. He had this little sun suit that said “Little Guy” on it, and we just called him Guy ever since then.”

Source: Murder Capital of the World, by Emerson Murray, 2021 / Photo: Pete Amos