I don’t know if it shows on this photo and I just can’t see it (Lemmios cuts photos off for some reason) but I read somewhere else that the nurse after Lucy that was there for the most attempted/murders were there for just 7 of the 25.
About the murders stopping, it occurred to me that if she were being set up, that would be the perfect time for the real murderer to stop - after someone else had been arrested. Clearly my latest criminal minds re-binge if affecting my brain though - so much evidence points to her it’s beyond unlikely that this is a set up/conspiracy.