Congrats on reaching out for help! This dog is unpredictable so your first step is to quit putting other people and dogs at risk!
A nobody got hurt..this time is "not" a good way to go!
I'd start here post 8:
New Dog, Very Challenging
Who Pets my Puppy or Dog is where I would start, I would add this:
**Selzer** Sitting On The Dog
He most definitely should be a "should not pet dog" until you can get work done with him!
Leerburg | Dealing with the Dominant Dog
Basic obedience is of course very important but you have problems way beyond that!
There is also this
BowWowFlix.com: Dog DVD Rentals | Dog Training Dvd | Dog Dvds | Rent Dog Videos
It's a subscription service and you can rent the Don Sullivan DVD's there. Don't know what he does but I look his "attitude."