A retired bank official was killed allegedly by his son at Kolabagan area of sadar upazila on Friday night.
The deceased was identified as Alef Khan, 67, a retired official of Janata Bank and resident of the area.
Family members alleged that Jahangir Alam Khan used to torture his father for money, said Md Rashid Ahmmed, officer-in-charge of Khagrachhari Sadar Police Station.
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Jahangir locked into an altercation with his father at night. At one stage, he strangulated his father to death, claimed the family members.
Alef Khan’s daughter Anwara Khanom filed a murder case.
Police also arrested the accused son, said the OC.