I believe inspector Abilard always considered some dude name Kosminsky (or something like that) as the Ripper but never had enough evidence to try him. It’s one of those things that are fun to speculate about but we’ll never know - like “What would have happened if General Ewell had tried to take Cemetary Hill on the first day of Gettysburg?”
If there is indeed a piece of physical evidence which ties the two people together, it's pretty compelling to me. Not definitive, but compelling. Anyway far more so than "this guy is a butcher so he would have been bloody all the time; therefore he did it."