After he was arrested in 1973 for the murder of eight women, Ed Kemper was asked by police to provide a handwriting sample by copying the note he left at his mother’s and her friend Sally Hallett’s murder scene. The document is signed by Kemper, detective Terry Medina and inspector with the Santa Cruz County District Attorney’s Office, Richard F. Verbrugge.
Source: Murder Capital of the World by Emerson Murray, 2021