I think I originally learned that ratio of corrections officers to inmates on NPR. Regardless, here's a few sources:

https://www.thecity.nyc/2021/7/11/22572991/rikers-island-getting-more-jail-guards-correction-officers

https://nypost.com/2022/09/10/nyc-correction-officers-fleeing-in-droves/

Rikers is such a cess pool. People are dying in there. There are more correctional officers than "inmates". This needs intervention. I wish Advocate Williams would raise hell about this (rather than saying that "it's better than last year" [paraphrasing).