The Daily Mail (U.K.) reports DNA analysis of blood on a scarf found by one of Jack the Ripper's victims shows the killer to have been Polish immigrant Aaron Kosminski. He was suspected at the time and later died in an insane asylum, a likely paranoid schizophrenic.
British papers are somewhat sensational and not altogether reliable, so view this report as a probable proof. Hat tip to Lucianne.com for the link.
