My dogs bite a young boy in the beach when he was little, like 2 years old.
We where afraid because Barrabas could do it again. Luckly us, it looks like he understood it was wrong, he didnt do it anymore till noew, hes 9 years old.
My house is by the beach and the dog sometimes still goes by himself to take a bath
So... you should watch over your dog and see if he does it again. Then, if he is dangerous, i dont know, if its not safe... lock him up 4 ever ?