In 2014, mitochondrial DNA that matched that of one of Eddowes's descendants was extracted from a shawl said to have come from the scene of her murder. The DNA match was based on one of seven small segments taken from the hypervariable regions. The segment contained a sequence variation described as 314.1C, and claimed to be uncommon, with a frequency of only 1 in 290,000 worldwide. However, Professor Sir Alec Jeffreys and others pointed out this was in fact an error in nomenclature for the common sequence variation 315.1C, which is present in more than 99% of the sequences in the EMPOP database.