A team led by hunter Nawab Shafath Ali Khan from Hyderabad, along with veterinarians, had been camping in the higher reaches of Raj Mahal Hills of Sahibganj for the objective.
Sharpshooter Shafath Ali Khan said in an interview that he first came upon the animal on Thursday, and fired a tranquilizer dart into the elephant's neck but did not bring it down. The hunters had tried to tranquilize and capture the animal for a week, but after many unsuccessful attempts, officials gave the team permission to kill the elephant.
The wild elephant, believed to be about 25-years-old, had killed four people in Bihar in March before it crossed over to neighbouring Jharkhand state where it crushed 11 people to death.
"It was quite a hard operation because of the thick bushes and since the animal had turned rogue it charged at us before I pulled the trigger", Khan said.
Elephants kill roughly 60 people every year in forested Jharkhand, Singh said.
Khan, who has carried out 24 previous government-sanctioned hunting missions, said he was baffled by the elephant's behaviour.
Those who were killed in Jharkhand belonged to the endangered tribal community known as Pahariya.
The sharpshooter was last roped in by authorities in western Maharastra state, where he tranquillised a killer tiger. "But if it doesn't happen, killing is the last resort", he said. "I prefer tranquilizing animals".
Incidentally, August 12 is observed as World Elephant Day.
Violent encounters between elephants and humans were an "increasing trend", said Singh, as vast swathes of forest are cleared for human settlements or industry.