Rav Gedalia Schwartz: Status as a married woman canceled without a get - by disqualifying a witness

We have discussed the annulment of a marriage by declaring that it was a mistake - mekach ta'us. We have also mentioned that the Krauss Beis Din annulled a marriage because a witness was disqualified because he wasn't Shomer Shabbos. Rav Gedilia Schwartz also does that. The question is if there are other people at the chasuna who are religious - the marriage would still be valid. In the following letter Rav Schwartz says he annulled the marriage because he has two witnesses that one of the two official witnesses was and is not Shomer Shabbos. However he doesn't say that he has established that there were no frum men at that wedding who also witnessed the marriage. Can it be assumed that he went through the wedding photos and established that there were no frum men there?

Here is the letter declaring  that the marriage was invalid and she does not require a Get to marry.

======================Here is a second case - details unknown ===