Indian Penal Code, 1860
202.
Intentional omission to give information of offence by person bound to inform
Whoever, knowing or
having reason to believe that an offence has been committed, intentionally
omits to give any information respecting that offence which he is legally bound
to give, shall be punished with imprisonment of either description for a term
which may extend to six months, or with fine, or with both.