Police said the decomposed body of 19-year-old Sharath Kumar, an automobile engineering student, was found buried near the Narasimhayyana lake in the southern part of Bengaluru.
The kidnappers sent a WhatsApp video from Sharath's phone to his parents in which it was seen that the young boy asked his parents to submit a ransom of Rs 50 lakh to the abductors who as per him looked like terrorists.
According to reports, six persons, including a close relative of the teenager, have been arrested in relation to the murder. The 19-year-old's father, Niranjan Kumar, is a senior Income Tax official.
The next day, the alleged kidnappers sent a video message via WhatsApp to the youth's mother and sister.
Police said the body has been exhumed and further investigations are on. Later, when the body surfaced, the accused removed it from the lake and dumped it in a quarry, the police said.
Vishal said during the confession that when he and his accomplices learnt of the police's involvement, they kept Sharath in a vehicle and moved around the city, the police said. The kidnappers allegedly killed Sharath fearing that releasing him might land them in trouble. "The accused then made a decision to dump the body in a lake by tying it to some rocks" Rathore said. Vishal told Sharath to meet near Shirke Apartment at Kengeri Satellite Town, and then later they rode their bikes till Ullal RTO office. "They disposed of the body in the Narasimaiah lake by tying stones to it to ensure it won't float in the water", said additional commissioner of police (West) Malini Krishnamurthy.
Narasimhayyana lake before burying it some days later, police said.
They tracked the mobile transmission tower locations from where the WhatsApp messages were generated, eventually stumbling upon the mobile number that led them to Vishal.