Family members of a mentally challenged girl who was raped and then strangled and residents of Chawkbazar of Old Dhaka formed a human chain yesterday demanding proper investigation into the murder.
Later, they also visited the officer-in-charge of Chawkbazar Police Station with the same demand.
On November 21, police recovered the body of ten-year-old Monwara Akter Moni from near her tin-shed house at Islambagh and arrested a mason named Delwar Hossain in this connection.
Delwar, who was remanded for three days, did not confess his involvement and is in jail now.
"As Delwar did not confess, it seems that some others might have been also involved in the rape and the killing," said deceased's brother-in-law Emon Hawlader.
"So we came here demanding proper investigation," he said after meeting with the OC.
OC Azizul Haque said Delwar used to stalk the girl.
"DNA samples from both the girl and Delwar have been taken. After tests, we can determine whether he killed her or not," he said.
The OC said investigation of the case was a top priority.