It's also the largest or second largest jail in the country depending on how you count, and close to the largest in the world. It makes sense to go for the largest and lowest-hanging fruit if it somehow remains uneaten even after many decades of reporting and investigations.
Agreed! Just a reminder that NY Daily News is only slightly to the left of the Post so we can't discount the subtler message here -- "this data extrapolates to every jail in the US 1:1." (An oversimplification, the article also quotes someone saying this practice "seems cruel" for ex.)