Yes, I have a lock on my door. I have both threatened to call 911 and actually called 911 in the past; they have a record of the abuse. Nothing deters him. The only thing I can think of that may come of reporting him again would be to get him kicked out of the National Guard, but that would mean he's at home, so not such a good idea...
I told my dad last night, and I'm so happy he reacted the way he did. He got REALLY angry at my brother, and basically kicked him out on the street. I don't know if it will last, but at least now my dad's more serious about getting him out of the house long-term. It's good to have someone on my side .
Thanks for all the input guys . I don't know what I'd do without PC...