Callanen compiled the list of names after she determined that they had stated on juror summons cards that they should be excused because they weren't citizens.
I'm almost certain the problem is much more severe than they are letting on. It could take years before a citizen receives a jury duty summons (I've received two in the last ten years). I believe it's time to broaden the investigation If their only link at this point is folks requesting release from jury duty because of non-citizenship.