Chennai
The commission has asked them to submit the report within four weeks.
Last month, the alleged custodial death case of the father-son in Tuticorin had created much uproar in the state.
Five police personnel have been arrested after the incident and are being held in Madurai Central Prison.
The Centre on July 8 had handed over the case to the Central Bureau of Investigation (CBI).
The case was initially registered at the Kovilpatti East Police Station in the Tuticorin district.
The victims, P Jayaraj (59) and his son J Benicks (31), were arrested on June 19 and lodged in Kovilpatti sub-jail for keeping their cell phone shop in the Sathankulam main bazaar area open during a curfew amid COVID-19 lockdown.
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