Put things in perspective a bit and you will see that this is like that Russian novel "the nose" where we are all following the weirdness of the missing nose, while the censorship of the time doesn't see that all the characters from different social classes are described in unfavorable ways.
A 9 year old girl doing this just doesn't fit any known narrative. Even when attacking someone in full view, the onlookers "didn't see it", even when attacked themselves. A man did this, there is no other possibility. Ok, we saw a girl, but a man set her up to it, so we'll tell the police what this man must have looked like. Surely he was Jewish and ugly. Maybe he was gay, and hated women. So we'll tell them that.
Also, normally there were no reported murders in Whitechapel, a small area with 80 000 people. How is this possible, it must have been very civilized.
... very poor people with no family died daily on the streets, a priest wrote that he was thinking about moving and closing the church because he had to step over dead bodies every morning on his way to his church.
However... the actual Jews at the hospital, medical students, were required to dissect two full bodies under supervision to get their license. If someone died in a hostel, which was a common occurrence as there were many homeless, why don't we just sell the body to the students? Why don't we but it into parts and sell them, then we get more than if selling the full body.
Anyone dying in Whitechapel will become someone's profit, and no one gets reported as murder victims. You'd have to be really fucking nasty about it to get it registered, because every, every fucking everyone will look the other way.
