It's a fascinating theory. But the sketch, which is indeed related to the Percy murder, was not drawn from Mrs. Percy's eyewitness account.
It was drawn from eyewitness accounts of a similar attack on a young woman in Evanston, IL (two towns south of the Percy's then residence) about ten weeks prior to the Percy homicide.
There is no sketch from the actual Percy attack because Mrs. Percy said, a 5 a.m., she didn't get a good enough look at the attacker. She was said to have noted similarities between the person she saw, and the sketch, but at the same time it is said she maintained she didn't see the suspect well at all, just that it was a person and the shirt and glasses and, supposedly the comment about the person's hair vs. the hair portrayed in the sketch. So, the statement "there is no doubt he did it," isn't so.
But of course, all we know is what was reported in the papers and there are tons of inaccuracies there. The reporting of what she said during inquest may be verbatim, though.
It was drawn from eyewitness accounts of a similar attack on a young woman in Evanston, IL (two towns south of the Percy's then residence) about ten weeks prior to the Percy homicide.
There is no sketch from the actual Percy attack because Mrs. Percy said, a 5 a.m., she didn't get a good enough look at the attacker. She was said to have noted similarities between the person she saw, and the sketch, but at the same time it is said she maintained she didn't see the suspect well at all, just that it was a person and the shirt and glasses and, supposedly the comment about the person's hair vs. the hair portrayed in the sketch. So, the statement "there is no doubt he did it," isn't so.
But of course, all we know is what was reported in the papers and there are tons of inaccuracies there. The reporting of what she said during inquest may be verbatim, though.