The counting was being held at the Sonamura Girls' School amid tight security.
Two others allegedly involved in the crime are still at large.
The husband identified as Kayer Miah was arrested on Friday and he has confessed to the crime, the police said
Security forces have been deployed in the area, he said, adding that senior officers were overseeing the situation.
The fact-finding team is expected to stay in the state till March 12 after which it will submit a report and the issue will be raised in Parliament which convenes from March 13