Choco - I read this too, yesterday, and wondered if it was a fellow COTHer's horse...but still no details. How sad!
I just briefly saw a post on another forum thread asking people to check their fences. Haven't read the thread, but I can't help but wonder if this horse got out because a fence failed in the snow? We so rarely get snow and freezing ground here...
I know my BO rides the fences probably everyday...or has the barn staff check them...but not everyone has this "luxury".
But if horses are turned out and a fence fails...they'll probably decide to go "visiting" down the road before they can be discovered.
As I said, I don't know the circumstances of this story...and am so sorry for the loss of the horse and the owner's loss. And, not to forget the unsuspecting motorist's injuries! How sad all the way around.