The 12-year-old victim was sexually assaulted and murdered at her home on April 16, 2019.
According to police, Satish blamed the 15-yr-old girl and attacked her after his engagement to another woman was broken off after the bride's family learned of his relationship with the minor girl.
A 17-year-old boy, their neighbour, was arrested 10 days later.
Police said the identity of the gang members had not been established yet and the motive behind the murder was not known.
The 48-year-old killed his ex during an argument, stuffed her body in a suitcase and set it on fire.
The accused duo were identified as 42-year-old Mukkadu Kumar and his relative Pambu Nagaraj (34).
The team then rescued the injured policemen and admitted them to a private hospital in Vellore. The two were said to be out of danger, police sources confirmed.
According to police sources, the accused intended to cash in on a fatal road accident that the brother of the one of the abducted had allegedly caused.
The boy, Azarudhin, is the third son of M Mubarak Basha from RK Pettai, who runs a meat shop in Sholingur.
Violence and arson swept through the Thazhanguda fishing hamlet in Cuddalore on Saturday night after the brother of a local leader was hacked to death by a rival gang.
The history-sheeter was identified as 24-year-old A Pambayan alias Thavamani of Ambedkar Colony in Thiruppacheti in Thirupuvanam.
The incidents came a day after a statue of social reformer EV Ramasami 'Periyar' was found daubed with saffron hued paint.
The girl died at Coimbatore Medical College Hospital at 9.40 am on Saturday, without responding to treatment
Two of them are alleged to have repeatedly assaulted the girl and were produced before the Juvenile Justice Board on Saturday.
A headmistress of a government school and her son were arrested in Perambalur on Saturday by the forest department, allegedly for hunting and abetment.