Russell Edwards claims Aaron Kosminski, a Polish barber, is the serial killer, though some people doubt his evidence ...

However, even reagents that cause degradation of DNA show only limited and partial destruction. Hence, very large DNA fragments containing the complete genetic information still survive treatment.

Over a century after he murdered and mutilated London women in 1888, the long-mythologized killer’s identity has allegedly been confirmed by DNA found on a shawl, historian Russell Edwards said.