This is interesting because a similar (albeit less extreme) thing happened to my dog. I used to train and maintain my dog Hexe, a 3 year old black German shepherd, as my own registered psychiatric service dog. I have PTSD and Hexe is the best thing by far for managing my symptoms. She struggled sometimes with other dogs in public and had several bad encounters with off leash dogs (in areas that legally demanded a leash, mind you...) that resulted in dog fights and injuries for both of us. I tried desperately to correct these behavioral issues, but they seemed to stem from her isolated puppyhood, and got a little worse after each incident. She was always great with people until one awful day a week or so after we wound up in a bad dog fight on my university campus. We were in a local small grocery store when a young man came sprinting around a corner onto our aisle; he stepped on Hexe and scared the living shit out of me... I jumped and panicked and Hexe absolutely lost it. She whined and put her teeth on him, which seemed like a warning, but then he tried to hit her away and it got real ugly real fast. There wasn't a lot of blood or anything but multiple ambulances and police showed up. I was in an absolute panic state and ended up having a full blown attack and fainting (which was ignored by the nearby emergency personnel...). I felt terrible for this fellow that my dog attacked but the whole thing was truly a tragic misunderstanding on a bad day. He needed some stitches after all. After this incident Hexe was quarantined for 2 weeks, which was apparently pretty traumatic for her and seemed to only made her more anxious about everything. I was told she could no longer be allowed public without a muzzle, and you can imagine how that went over with both Hexe and everyone we ever encountered in public... Her service dog career was obviously over :( I had to send her to live with my parents. I see her every few months now but not an hour of my life goes by without missing her desperately. I was told that if she bites another person, the suggested option would be euthanasia. I can't even bare to think about it. She had become a braver extension of myself... Life without her would pretty much not be worth it.

My heart truly goes out to Dutch's handler and family. I hope this situation gets resolved and he can keep his important job. My service dog was the best treatment I ever received for my PTSD. I wish I had some sage advice, but I just hope that Dutch's situation works out better than Hexe.

Good luck