Some others are: pardons based on new evidence that exonerates; pardons for political reasons or good behavior; unadjudicated matters that are still within the statute of limitations for the offense; unadjudicated matters that are now beyond the statute of limitations for the offense. 

You cannot ask what her disability is if it is not evident, only that she provide a letter from her health professional stating she has a disability that requires a service dog.  

For the next week I'll simply continue to email them looking at least for a response, that way I at least have the evidence that I've been trying to work with them.

If they push back for some reason you can present your evidence.

So, it's possible to see evidence of a bankruptcy without the actual bankruptcy appearing in the report if it was removed as inaccurate and not re-reported correctly.Credit scores usually only consider open accounts.

Should he encourage the existing tenant to call the police/gather more/better evidence?

All they are interested is in EVIDENCE!!!!!!

At first I thought it was just the guy who called me and his girlfriend interested in renting and the others were there for either moral support or to work off Sunday dinner but about five minutes into the showing it became evident that they ALL wanted to rent the place along with what appeared to be a vast assortment of children. 

Do not provide him evidence that you were snooping and taking pictures in his apartment.  

Anecdotes are not evidence nor represent the large majority of people with bad credit.