Wat action can i take......?

Basically, i work in a school, and a child that i have had excluded has claimed that i ualted him. This is a false allegation, and i have four eye witness that can support the fact that i did not ault him at the time he claimed. However, i have been suspended for work. I am just wondering what legal action i can take against this child or his family for surpporting this false claim, and what can happen to him.