You have to identify them first. I imagine that draft opinions go through dozens and dozens of hands as it makes its rounds.
The hands the drafts go through are documented every step of the way. There is not “dozens and dozens” of people handling the information. Each Justice has a certain number of clerks, some assigned to some cases and some assigned to others. It’s not as if the documents are laying around in the office for just anyone to review.
These clerks are highly vetted (even the liberal ones) and their integrity is closely vetted and watched. They WILL track down who leaked it, if this is in fact a real draft copy. If this draft is real and it was actually leaked, then I suspect it was liberal clerk that did so (I doubt even a liberal justice would do such a thing), all to create havoc before the primary election gets into full swing.
The process to be hired as a SCOTUS clerk is rigorous, as is all judicial clerk hires, but the process for SCOTUS is very, very demanding. There is even a category in law school rankings for “Judicial clerk hires”. They document which school has had the most SCOTUS hires in the past ten years. This will up-end the entire clerkship hiring process at law schools. Whichever law school that this clerk came from will never be considered for clerkship hires at any level ever again. Law school deans all over the nation will be canceling other meetings tomorrow morning to convene an emergency meeting of the law school’s “Judicial Clerkship committee” (Yes, each law school has such a committee).
Heads will roll!