Mike,
Wow. First and foremost glad you and your family are ok. Seeing the failure of your BD hitch is scary and deeply concerning to say the least. Oliver Service and the manufacturer of the Bulldog hitch should be made aware of this failure as soon as possible. This failure could have resulted in a really bad accident in so many ways. As others have mentioned take lots of photos, as every picture tells a story.
As time allows, please keep us posted on any further details if and when you learn the possible cause of this failure.
Again, most importantly, so glad you and your family are safe.
Patriot🇺🇸