For nearly 20 years, employees at the University of North Carolina at Chapel Hill perpetrated an academic fraud involving fake classes and grades that permitted at least 3,100 students — many of them athletes — to graduate, according to a newly released report (which you can read in full below). While a number of employees have been fired or under disciplinary review, there are still big questions about who knew what and when that the report doesn’t directly answer.

Chancellor Carol L. Folt, in a message to the university community, called the report an “investigation into academic irregularities at Carolina.” These are SOME irregularities. If you don’t have time to read the whole report, just read the executive summary at the top.

And here’s the report: