A case of murder under secion 302 IPC. On receiving the informtion the O.C of the police station rushed to the place of occurance with his team of police and arrested the accused, investigated the case and conduct inquest report and send the dead body for post mortem and got back to the police station and filed the FIR, and therefter the case was endorsed to his next subordinate officer for investigation as secong IO. The second IO conducted the same rituals of investigation including recoding of statements of witnesses, which was again taken over by the third IO. The third IO who never conducted the investigations filed charge shet against the accused without knowing anything but basically on the strength of case diary authored by the first and second IOs. Is this charge sheet valid in law?