Palaniswamy's family told the investigating officers that the priest, who runs Jayasakthi Spiritual Centre in Agaramthen near Selaiyur, had kept Palaniswamy under his control for over a year.
Ranjithkumar practised black magic in an illegally-encroached government land in Agaramthen near Selaiyur.
Palaniswamy believed the priest after some special events in his life.
Palaniswami visited him during Fridays and Sundays to attend midnight pujas, the two surrendered people said, adding the priest made some sacrifices during the pujas.Police have launched a search for Ranjithkumar and his friend Rajesh.
Around 11am on Friday, the Selaiyur police received a call about a man sleeping in a car parked on a farmland at Sathya Nagar.
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