Not the best position for the NFL to take. Investigators spend money to get their investigations done - that’s how it works. That is, if they really want answers.
If this kid were a first round draft talent, you bet your ass scouts would pay to get the information. If you want to know, you can find it. If you don’t, you won’t. But in this day and age, if you don’t - someone else will - and you will be right do outed as not really having wanted to know in the first place.
Either investigate, or don’t. But don’t pretend.