As some of you may or may not be aware, I have two GSD's.
If you were to walk past younger one, the male, who is an all black longhair and weighs 40 kg, you would be apprehensive, and yes, I can say that the dog does not have a bad bone in is body, (he gets burped after his dinner, he loves to sook in and cuddle you, he's scared of our gerbils) plus I know the (award winning) kennels they came from,
They are still dogs and have to be treated with care and respect.
All dogs can be dangerous, regardless of the breed.
It is down to the owner as to how the dog is raised.
One of my neighbours has a gsd, but he lets it loose to roam the street, it is disobedient and barks and snaps at anyone who walks past the garden.
I never take my eyes off of mine, and am always cautious when introducing mine to strangers.
You cannot always trust who buys a dog and for what means the intend to use it.
Rant over.
That guy should hand himself in to the authorities, he gets fined, and (hopefully) learns a lesson. The dog should not be allowed to see the light of day again.