Shirley Ann Duguay (October 11, 1962 – October 3, 1994) was a Canadian woman from Prince Edward Island who went missing in 1994 and was later found dead in a shallow grave. Among the most compelling pieces of evidence in the case was a leather jacket covered in Duguay's blood and over two dozen white feline hairs, marking the world’s first use of non-human DNA in a criminal trial.