My german shepherd is super sweet when indoors with me. But when we’re outside, she becomes really aggressive toward people and will even turn and bite me for trying to pull her away by the leash. (Her last owner wanted an attack dog and used abusive training methods.) It’s like she gets tunnel vision and will attack anything that tries to keep her away from her target. Even if it’s a family member. So how do I get her to chill out? Or at least get her out of "kill mode" without getting injured?

postmaster Smiling Dogs

Leash reactivity should be worked on with a trainer. Avoiding populated areas and always being aware of your surroundings in order to promptly change directions is a good start to avoid the problem, but you really need a trainer to help fix the problem. Make sure you are at least rewarding/praising her for her good strides. If she is walking nicely, let her know! But don’t try to tackle the problem alone. Good luck!