It is common knowledge that BSA made its ineligible volunteer files available to an independent researcher at the University of Virginia.
She provided initial findings in 2011, and an executive summary in 2012.
Here's the reference to her formal work on the files, published years later on a sample of 6878 perpetrators of CSA:
Warren, J. I., & Reed, J. (2021). Victim selection patterns of community‐residing child molesters identified by a nationwide youth‐serving organization. Behavioral Sciences & the Law, 39(3), 307-327.
Those conclusions have been folded into the