Carriers are usually looking for an incident.

Police shows up and takes pics and makes and incident report with a number.

I'll make sure the next lease includes the cancelation fee like you said, its a brilliant way to handle incidents like mine!

I had the whole incident on camera. 

Yes the banks are beginning to crack down, but there are a lot of loans out there and there have been very few incidents of the banks exercising the DOS clause, at least to judge by what people are saying on BP.    

Unfortunately, too far into the closing process to do anything at this point, so I'm going to finish off it, report the incident with documentation to their corporate offices, and move on from this rabbit hole.

If you were to refrain from reporting this and someone were to get sick, then that liability would likely now fall on you for failing to report the incident.

I'd like to add to them:  put in a clause in your lease that reads 3 or more domestic disturbance police visits may be cause for termination of lease, and: the tenant authorizes the landlord to procure a copy of any police incident report.The first clause is self-explanatory, the second--many police departments will NOT issue a police report to anyone not directly involved with an incident. 

I'm sure you could probably get away with doing PM, unlicensed, but I'm sure there are ramifications and lability if an incident occurred. 

Do not talk to anyone about this incident other than to say "it is very sad and the family has our thoughts/prayers/condolences, etc."