Please hire a lawyer with good reputation to handle this issue. Let your friends, your neighbors and your family members as many as possible to write how nice you treat your kid in details.
Go to the local Chinese newspaper and ask for help, you will get lots of support from local Chinese.
Write letter to the law maker to tell the whole incident , especially to write to those who has Chinese background to get support.
This is what I can think of now....... Good Luck !