TUTICORIN: The CB-CID on Wednesday arrested a sub-inspector of police after it booked six people on murder charges in connection with the death of a father-son duo, allegedly thrashed at a police station in this southern district in Tamil Nadu.

The FIRs filed in the case were altered to include murder charges against two SIs -- Raghu Ganesh and Balakrishnan -- as many constables and members of Friends of Police, CB-CID sources said. The said Raghu Ganesh was arrested by the CB-CID officials, who took over the probe into the case which has triggered a nation-wide outrage.