Abu Nasar Gunnu arrested in connection with Mahmuda Khanam Mitu murder was released from Chittagong jail yesterday.
He got released after they had received a High Court order granting him bail, said Senior Jail Super Ikbal Kabir Chowdhury.
On June 5, Mitu, wife of former SP Babul Akter, was hacked and shot dead at the city's GEC intersection, while she was on the way to put her son on his school bus.
On June 8, the detectives arrested Gunnu in Hathazari upazila.