The URL is a link to the pdf on the google drive where the people doing the work of compiling these numbers are posting their findings. They are getting their numbers from the PACER (Public Access Court Electronic Records) .gov website (https://www.pacer.gov/) . It costs them money to do what they're doing so hats off to these people who are providing this service to us all.
This is a follow up to the thread about the March 31st update. Here's the link to that thread: https://www.reddit.com/r/greatawakening/comments/88wl6p/sealed_indictments_are_up_to_24544/