I would not get into defending how  safe the neighborhood is the only thing you can really say is that you lived there for x years without incident.

He told the owner next door, the new neighbor called me, said he would talk to the stump grinder but the stump grinder probably doesn't have insurance and might not have the means to fix the issue.Would love to clean some wisdom of how to go about this from those who have had similar incidents.

Before the incident, I talked with the tenant about the serious nature of the ceiling.

Then have the tenants call the non-emergency police line each and every time there is an incident or 911 if it reaches that level.  

We did this with a couple SFH, and just increased our umbrella insurance coverage with our broker to about $2 million dollars with 2 incidents max per year.

If they check "no" and there's an incident later, you may have proof that you had no knowledge of the dog's aggressive behavior.

The incident was an angry response on their part because I had the property manager board up the house.

In Tampa Hartline built out special bus stops for the fast Metro line on Nebraska and they turned into hangout areas for all the street people who fill them with trash and cause multiple incidents requiring the police.

One of the incident's is where the neighbor just didnt like living next to renters.

Renter's insurance is quite inexpensive and will benefit not only the tenant, but also you if an incident occurs on the property that was the tenant's fault.