A pregnant wife died when her husband allegedly kicked her on Tuesday midnight. The incident took place at Raushunia Tharigaon under Sirajdikhan upazila in Munshiganj district.
The killer husband Saizuddin, 48, has been hiding since the incident.
Body of Jahanara Begum Jami, 40, was sent to Munshiganj morgue for postmortem on Wednesday.
Badiuddin Bodu, brother of Jami, said his sister was killed after torture but police forced them to file a case of unnatural death.
The couple was married 20 years ago and they have two daughters and one son.
Police said the incident took place over family feuds.
Officer-in-Charge of Sirajdikhan Police Station said the case of unnatural death was filed because Jami’s in-law’s family said she committed suicide by taking poison.
However, the next course of action will be taken after having the postmortem report, he added.