I'm going to try to answer both your questions in one e-mail. Your message came through a little garbled, so I hope I'm going to get this right. You said you were able to save your house,. What about your horse?
I'm not trying to pry , but do you go to church? Do you pray to Heavenly Father? If you do, then this answer might help you. If I were you, I would thank Heavenly Father that your house was not destroyed. Then, I would ask Heavenly Father to help me with my fear. If you pray and truly believe that Heavenly Father will help, He will.
Now, on to the other part. Did the person throwing the firebomb touch your horse or your car. Is that why you're concerned about DNA? Again, I can only say what I would do in these circumstances. I would try and find the device used in the fireboimb. If it's still intact, carefully put the item in a plactic bag, being careful not to touch it anymore than is absolutely necessary. The police may be able to get finger prints off of it.
I hope this has been helpful. My prayers will be with you. Please believe me when I say what has been said so many times to me: this too will pass.
Cheryl