I would try to find the cats owner and tell them it had bitten the little girl and ask if it is up to date on all shots, if not, I would call the man back... if it has, I would call him and tell him who owns the cat.

First clue here is the little girl was close enough to be bitten by a stray (?) so who knows what she was doing to the kitty. But I would hate to think she had to take those shots because I kept quiet.

It is a very "iffy" situation that could have been avoided if the owner kept it inside!