They will send a detective over to investigate and should arrange for quick removal of the body.Meet them there to let them in, and possibly secure any firearms into your or their possession.Easy process.Good Luck! 

My kinds of tenants seem to like firearms (and beer, and naked women).

I don't think you can prevent people from owning firearms and keeping them at your property. 

Remove your personal things like clothing, shoes, firearms and perishable food. 

Can a landlord restrict or prohibit a tenant possessing firearms in a rental unit, or on the common areas of rental property? 

Let’s say I’m in a legal gun state and my tenant has firearms and shoots someone, am I responsible for that too?

That said, I've been shooting for years so I have a gun (Glock 22, Gen 3, RTF for you gun nuts) but I don't know the intricate details of firearm self defense legality.

I'm a firearms (Class III) dealer on the side.

There are investment funds that only invest in 'green companies' and some who do not invest in 'alcohol, tobacco, or firearms' companies - so there are some people who will invest in something if they can make a profit AND help someone else out at the same time.

The manager could issue a "Notice To Quit" to the upstairs, so that the undesired behavior of discharging a firearm on premises (without good cause) is not repeated.