Additional district and sessions judge-III Arun Kumar Singh found Chandan, Radheshayam, Vinod Kumar and Vishwanath Choudhary guilty of kidnapping and killing Rishap Raj, the four-year-old son of Dilip Choudhary at Bochaha in Muzaffarpur district in 2006.
Singh sentenced Chandan, Radheshyam and Vinod Kumar to death and Vishwanath Choudhary to life imprisonment. He also slapped a fine of Rs one lakh on Choudhary.
The murder was a fallout of a property dispute.