Sherwood Morrill was a handwriting expert who examined documents related to the Murder of Cheri Jo Bates. According to the article, on 1970-11-16 Morrill and journalist Paul Avery stated that the Cheri Jo Bates desk poem and the Cheri Jo Bates 1967 letters were “unquestionably” written by the same individual who later wrote the Zodiac letters. The Riverside Police Department remained unconvinced of this conclusion.