Aunty Agony wrote on Oct 14^th, 2016 at 7:00am:

It could be anything. They won't tell you. For all you will ever know, it could be your high school English teacher who is still pissed off because you refuse to capitalize "i" when referring to yourself.

That's absolutely correct, Auntie.  In my case, my BI for a summer IC  internship was fouled up by a group of cowards at the library where I worked part-time while in school.  None were authorized by me as references.  One bitter lesson that I learned from all this was that, as a class, institutional (as opposed to public) library staff are nearly as despicable as  are advocates of the polygraph!   ::)