Ramkumar was taken into custody as the prime suspect in connection with the murder of Infosys employee S. Swathi at a railway station.
Hearing a petition filed Ramkumar's father, the court ordered the post-mortem to be conducted on Tuesday in the presence of a forensic expert representing the petitioner.
According to police, Ramkumar committed suicide by biting into a live wire on Sunday evening.
Meanwhile, the opposition parties in the state have demanded a probe into the alleged suicide of Ramkumar by the Central Bureau of Investigation (CBI).
Ramkumar's relatives in his native Meenakshipuram village in Tirunelveli district protested on the road demanding a CBI probe.
