A CBI spokesperson R.K. Gaur said in Delhi that the agency filed the chargesheet against 9 then police officials namely -- S. Sridhar, then Inspector and SHO, K. Balakrishnan, then SI, P. Raghuganesh, then SI, AS. Murugan, then HC, A. Samadurai, then HC, AM. Muthuraja, then Constable, S. Chelladurai, then Constable, X. Thomas Francis, then Constable and S. Veilumuthu, then Constable -- all of Sathankulam Police Station in Tamil Nadu.