A court in the southern province of Dong Nai Monday sent a local police officer to nine years in prison for shooting his boss and injuring another officer in a drunken fight in 2013.
Ngo Van Vinh, 40, who had been dismissed after the shooting on September 22, was convicted of "murder".
Vinh and his co-workers were drinking at a local karaoke parlor when they met Tran Ngoc Son, the deputy chief of his division, and his friend Truong Thanh Chi.
Even while greeting each other Vinh and Chi got into an argument, which ended up with the latter hitting Vinh in the face with a glass of beer.
Vinh, who was injured, blamed Son for not taking his side, which led to a quarrel and then a fight between the two officers.
Prosecutors said Vinh later left the parlor for his office where he waited for Son with a pistol.
Son then met Vinh and dared him to shoot before hitting him in the face.
Vinh drew out the pistol and they started fighting for the weapon, during which the gun fired a shot into officer Doan Thanh Phu, who was trying to stop the fight.
Upon hearing the shot, some officers rushed to the site and saw Vinh and Son fight, during which more shots were fired.
Only when the pistol was out of bullets did the officers manage to rush Son and Phu to a hospital where Son, who was shot in the torso, succumbed to an aortic rupture.
Phu was injured in his hip.
Vinh was first prosecuted for "murder under provocation," which carries a jail term of six months to three years.
However, at a hearing last August, a bench suspended the trial and ordered further investigation into the case.