It's a bit of a nuisance when they lose a toe or a few fingers and the investigation shows the person was also your tenant especially if the regulations state the landlord is responsible for upkeep..

Now at least I have some options to investigate 

This is worth investigation by all landlords.This "IS" should not be confused by the Clinton definition of "is":)

I looked at sub-metering a property that I own and although I have decided against it for now, the investigative process was educational.  

Do it yourself and investigate old addresses.  

I want to investigate this ASAP and assist in any way I can with your closing. 

Do some investigating on your own and findout from the city/county how long is the permitting process.  

Rely on and follow your internal procedures to do a thorough investigation, particularly into his rental and work history.

That might be something to investigate for you and your dad to investigate and make your grandmother more comfortable with deeding it over.

Haven't investigated too closely to know if it's  accurate or not but the info is this: Huntsville is a recipient of a lot of defense and NASA related spending.