Three people were awarded rigorous imprisonment for life for killing a night guard of a bazar in the town.
The court also fined them Tk 20,000 each, in default to serve one year more in jail.
Special Court Judge Md Shahid Ullah delivered the verdict yesterday, said Advocate Ariful Haque Tito, lawyer for the state.
Of the convicts, Biplop Baroi of Tetla village under Banaripara upazila of Barishal was present while Nurul Islam of Charadi village under Bakerganj upazila of Barishal, and Bareq Sikder of Boroitali village under Taltali upazila of Barguna are absconding.
According to the prosecution, the gang hacked to death Qader Sikder, 70, a night guard at Kalatala bazar on November 26 in 2018. His son Jahirul Islam recovered the body the next day.