I haven't watched this documentary, but there's a very good review by Tim Dowling:
www.theguardian.com/tv-and-radio/2019/mar/27/the-yorkshire-ripper-files-a-very-british-crime-story-review-a-stunningly-mismanaged-manhunt
Some of it is so chilling. West Yorkshire Police's multiple errors were the result not just of staggering incompetence but deep misogyny.
And this quote from the attorney-general's speech at the trial is just extraordinary:
“Some were prostitutes, but perhaps the saddest part of the case is that some were not. The last six attacks were on totally respectable women.”
I'd love to say things were different now. But they're not.