Was the man called Leather Apron Jack The Ripper?

Without a doubt he was not. The man known as Leather Apron was a local shoemaker named John Pizer. When panick was at its highest anyone that wore a leather apron or used a knife in his line of work could very likely become a Ripper suspect. This is exactly what happened to Pizer.

After being questioned and then released by the police the public decided Pizer had to be the Ripper and had the man not run and hid he most likely would have been strung up by the crowd. For quite a while after being questioned, Pizer had to stay out of sight for his own safety.