A police officer and his stepmother were arrested early yesterday on charge of killing a neighbour at Andhariapara village in Phulbaria upazila.
The arrestees are Sub-Inspector (SI) of Jamalpur Sadar Police Station Mohammad Ali, 50, son of Ali Fakir, and his stepmother Firoza Khatun, 48, of the village.
The deceased was day labourer Selim Mia, 38, a neighbour of Mohammad Ali. He was a drug addict, said Officer-in-Charge (OC) of Phulbaria Police Station Sheikh Kabirul Islam.
The SI's son Riad Ahmed, 20, and Selim, also the father of two school going children, used to take drugs together, said the OC, quoting local people.
Riad and his uncle Mohabbat Ali riding a motorbike picked up the victim from his house on Saturday night following Mohammad Ali's order, said family members.
They later took Selim to the SI's house and killed him, said his younger brother Ali Hossain, a day labourer.
The killers tried to strangle Selim at the cowshed of the house and left the place, leaving him injured, said OC Kabirul, adding that Mohammad Ali was not present when the incident took place.
On information, Mohammad Ali rushed to the spot from the upazila headquarters and sent critically injured Selim to the upazila health complex.
Selim was later admitted to Mymensingh Medical College Hospital as an accident patient as his condition worsened.
He died there on Sunday morning, said the police official, quoting the victim's family members.
The body bore several injury marks made by sharp weapons, he said, adding that police recovered towel, rope and blood stained shirts from the spot.
Ali Hossain said some 12 years ago, his brother Selim beat up Mohammad Ali's father Ali Fakir at local Andhariapara Bazar as the latter blamed Selim for stealing a tree. Later, a case was filed in this connection.
The killing might have occurred following the previous feud, said Ali Hossain.
The victim's wife Fatema Khatun Shefali filed a case, accusing the SI, his son Riad, stepmother Firoza Khatun, stepbrother Mohabbat and nephew Farhan.
Police are raiding different areas to arrest other accused, said the OC.
Meanwhile, local people brought a protest procession in the area, demanding arrest and exemplary punishment of the killers.