But there were shooting incidents nearby and other kinds of crimes.

I like Matthew's suggestion, too.Later, you'll be able to made a good decision about this particular incident and carry it out.

It was not shingles and looks like there were incidences fo water leakage.

Not only will they carry fleas (which you might need to get a pest control company in), but if there's an incident which their pet attacked your neighbors, you might get some fines for that.

Personally, I respect you for wanting to understand this guy and the specifics of the incident. 

I had an incident where Buyer tried to do something similar. 

(I)(1) The terms "real estate broker," "real estate salesperson," "foreign real estate dealer," and "foreign real estate salesperson" do not include a person, partnership, association, limited liability company, limited liability partnership, or corporation, or the regular employees thereof, who perform any of the acts or transactions specified or comprehended in division (A) of this section, whether or not for, or with the intention, in expectation, or upon the promise of receiving or collecting a fee, commission, or other valuable consideration:(a) With reference to real estate situated in this state owned by such person, partnership, association, limited liability company, limited liability partnership, or corporation, or acquired on its own account in the regular course of, or as an incident to the management of the property and the investment in it;(b) As receiver or trustee in bankruptcy, as guardian, executor, administrator, trustee, assignee, commissioner, or any person doing the things mentioned in this section, under authority or appointment of, or incident to a proceeding in, any court, or as a bona fide public officer, or as executor, trustee, or other bona fide fiduciary under any trust agreement, deed of trust, will, or other instrument that has been executed in good faith creating a like bona fide fiduciary obligation;(c) As a public officer while performing the officer's official duties;(d) As an attorney at law in the performance of the attorney's duties;(e) As a person who engages in the brokering of the sale of business assets, not including the sale, lease, exchange, or assignment of any interest in real estate;(f) As a person who engages in the sale of manufactured homes as defined in division (C)(4) of section 3781.06 of the Revised Code, or of mobile homes as defined in division (O) of section 4501.01 of the Revised Code, provided the sale does not include the negotiation, sale, lease, exchange, or assignment of any interest in real estate;(g) As a person who engages in the sale of commercial real estate pursuant to the requirements of section 4735.022 of the Revised Code.(2) A person, partnership, association, limited liability company, limited liability partnership, or corporation exempt under division (I)(1)(a) of this section shall be limited by the legal interest in the real estate held by that person or entity to performing any of the acts or transactions specified in or comprehended by division (A) of this section.

The first time floods do much better because Harvey  is considered a freak incident (54" of rain).

I am waiting to see if I can get any details regarding the bankruptcy, specifically if it was one incident or multiple that lead to insufficient funds in the account.

Had you been notified by the city or a neighbor of issues with the tree prior to the incident, there may have been some liability... but that is still rare.The owner of the vehicle should file an insurance claim under the comprehensive coverage of their auto policy.