Yeh Rishta Kya Kehlata Hai S02 E11 Naitik is arrested

Akshara finds Naitik detained in a police station. Naitik's grandfather is furious and tells the police that Naitik is not his grandson. The police give a whole different story to Naitik's case. Why did the police arrest Naitik? What will happen to him now?