Please guys i need help?

So my stepmom`s son lost his nintendo DS. Everybody is blaming me for it, because i did this in the past. I got my stepmom`s phone and i threw it away they found out it was me but i was lying about it. So now the kidd lost his nintendo DS and they think it was me! And my dad is taking their side and i can`t go to my mom because she ped away. And my dad said if it does`nt appear i will hit you like a million time with my belt! Any help?