Additional District and Sessions Judge Shayam Kumar also imposed a fine of Rs 10,000 each on the convicts Kuldeep, Praveen, Gaurav and Amit after holding them guilty yesterday.
Cane farmer Vikas Jain was shot dead when he was returning from a sugar mill in Rohana village in the district on December 18, 2009.
In another case, three persons were sentenced to life imprisonment by a court here for murdering a man on June 12, 2002.
Additional District Judge Mohd Ali also imposed a fine of Rs 30,000 each on the convicts Ashok, Praveen Kumar and Lala.