The 300-page charge sheet was filed before Judicial Magistrate C Sridhar, supported with 69 documents and 97 witnesses, investigating officer Balasundaram told reporters here.
The estate guard, Om Bahadur, was murdered and another guard Krishna Bahadur Thapa assaulted on April 23, when a group of men barged into the Kodanad estate, which was frequented by AIADMK leader Jayalalithaa for her retreats.
The Kodanad Estate figures in a disproportionate assets case involving jailed AIADMK general secretary V K Sasikala and Jayalalithaa.
Police arrested 10 persons, majority of them from Kerala, and lodged them in various jails in Tamil Nadu and Kerala.
The key accused Kanagaraj, a former driver of late CM Jayalalithaa, was killed in a road accident near Salem two days after the incident.
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