I am fond of this youtube channel because Brooke does a real good job of presenting various cases. For Ripperology, the most salient portion begins at around 6:30. There is an in depth description and confession from this 1830s, English murderer. There are aspects of both JtR's activities and the torso cases. This killer had an accomplice but with or without help, maybe the particulars show us a bit about JtR's experiences.

https:www.youtube.com/watch?v=F_Mv8yScya8

(That link even works! I did something right for once.)