Sounds like the husband has a rock solid case for a lawsuit against the property owners for negligence. They obviously were not being responsible when they neglected to make sure of the health and well-being of the tree on their property. A massive tree such as this should have been properly cared for and removed once the defect was found in the roots especially with the knowledge that the height would allow it to reach public areas where innocent pedestrians could suffer physical harm or property damage. It was a danger to the community just as if someone stockpiled drums of gasoline, sarin, explosives, or bibles.
I hope the state's attorney general will start an investigation into whether or not criminal charges can be filed against the property owner.
F*****g tree owners, they ought to have to register these killing machines. Kids carrying twigs to school... eyes getting put out... we need the government to regulate this, you just shouldn't be able to buy a sapling at Home Depot or Lowes without a 3 day waiting period and backyard check.