I don’t know who it was, but my dad was very interested in the case and was convinced there was a Salvation Army connection for reasons I don’t remember, but then years after he told me that, this came up:

https://www.huffingtonpost.co.uk/2014/07/14/jack-the-ripper-new-novel-suggests-east-end-serial-killer-female-salvation-army-worker_n_5583639.html