Abul Khaiyer, owner of Sajeeb Builders, was found dead on the top floor of an under-construction building at Bashundhara Residential Area in the city on Friday.
Quoting the victim's brother Abdul Bari Babul, police said Khaiyer went out from his residence in the evening after receiving a phone call and remained missing since then.
Later, someone noticed the body on the roof of the second-floor under-construction building at the 'M' Block and informed the matter to police who recovered the body around 10:15am, said officer-in-charge of Bhatara Police Station Muktaruzzaman.
Police suspected that miscreants killed him sometime at night as the body bore injury marks on his head.
However, the motive behind the killing could not be known immediately.
