You already met his (adoptive) dad earlier in the game. Proceed with the plot and you'll find him.
As for his biological dad, nobody knows.
Chat with our AI personalities
After you beat your dad in his gym wallys dad gives it to you for helping wally
in a crowd of pandas
N'Sync
I don't know that is what i was trying to find out
You should tell your mother, if your mother gets beaten too. Call the police (911) and hide somewhere your dad cant find you. If not, lock your doors with anything. You might end up as an Orphan. =(