they had only the vaguest description of a man who they thought might have been the Ripper, and they weren't even sure that the person described was the perp.
The most logical suspect was a man named Nathan Kaminsky.
Agreed. The fact that the police pulled their men out of the neighborhood at the same time he was chucked into an asylum is telling.
The prime suspect's name was Aaron Kosminski, not Nathan Kaminsky.