Whitechapel was, to put it mildly, not a very pleasant place and the canonical five victims of Jack the Ripper were all sex workers and the sort of people that, sadly even today, are generally seen as disposable by society at large. So I'm wondering - when did London begin to actually 'care' about the murders? Like when did it go from 'some tart in the ghetto got herself killed, I suppose we ought to look into it.' to 'holy crap there is a serious problem and we need to do something about it ASAP!'
I believe I recall there having been riots after the second murder. Was that it - was it the murder of Annie Chapman and/or the Dear Boss letter that followed that made the public at large begin to care about the murders? Or was there an almost immediate reaction with the sheer brutality and bizarre nature of poor Polly Nichols' murder that brought attention that the death of a sex worker in Whitechapel otherwise would not have brought?

Like, basically, when and why did the Whitechapel Murders become a big deal?