I just read all 28 pages of this and I am sitting here sobbing. I can't imagine what you have been through. My heart and my prayers go out to your family and the others involved. I will be constantly praying for your husbands health as well, I worked in therapeutic riding and phyical rehab for years and I understand how important it is for him to get moving again, or riding, in this case.
And in my frustration for you, I hope someone shoots the bas*****!
One is closer to God's heart on a horse than anywhere else on earth!