@wvcorley Hi! I'm the head mod of r/PitbullAwareness! One caveat about the break stick - I actually don't recommend these like I used to. They are good tools to have around, but are really are only useful in certain situations, and with certain types of dogs... IF you know how to use them properly, and most people don't. If a dog is prone to redirecting (which sounds like it may be the case with this one) or has a "snappy" style of biting, a break stick is likely to get you bit.
The safest and most effective way to end a dog attack like this is to grab the collar, lift them off the ground by the front end, and choke them out by twisting the collar to cut off the animal's air supply. If there is no collar, grabbing the underside of the dog's neck and squeezing HARD will have the same effect.
@malachilad I don't think this is a "sexual maturity" type of aggression - this sounds like it may be ideopathic. You have a mixed breed, backyard bred nightmare with poor genetics and unknown epigenetic influences. All of this manifests in a horrible temperament, which is GENETIC, and no amount of training is going to fix this. This aggression could literally be coming from anywhere. A level 5 bite is extremely serious and it is very likely that this WILL happen again.
I'm going to give you some advice you really don't want to hear, but I feel like have to say it. This dog is dangerous and is not safe for society, and rehoming this animal is simply making it somebody else's problem. If you intend on keeping this animal, I think it is socially irresponsible to do so. For me, this dog is a BE candidate, full-stop.