A man, with the help of some of his friends, posed as officials of Detective Branch (DB) of police, and looted Tk 15 lakh of his brother in broad daylight.
DB revealed the information after three of the six member gang, including the mastermind Rajon, gave confessional statement in the court last Monday.
Arrestees Enamul Hassan Rajon, 38; Khoiam Parvez, 46; and Juwel Mia, 30, are now in jail.
A team of DB police arrested the three while conducting drives in Dhaka's Badda, Ramna and Bangshal area last Sunday, said Sikder Hasan Imam, senior assistant commissioner of DB police.
Rajon is the younger brother of victim Najmul Hasan, a businessman.
On June 25, Najmul's manager Babul Das, 32, and Md Hossein, 43, withdrew Tk 15 lakh from Mercantile Bank Limited's Wari branch and headed towards Dholaikhal on a rickshaw.
When they reached near Tipu Sultan Road of Wari, four people on two motorbikes stopped the rickshaw and introduced themselves as DB officials. They took away Babul Das along with the money, leaving Hossein behind, said AC Imam, quoting the case statement.
Later, the perpetrators stopped at an empty street and took away the money, stabbing Babul in the stomach.
Najmul filed a case with Wari police against four unidentified people.
DB police, through a shadow investigation, came to know that the victim's younger brother Rajon is a drug addict and his business had failed despite taking a loan from Najmul.
AC Imam said that the accused shared the looted money and went into hiding after the incident. Of the total amount, Rajon took Tk 5 lakh; Parvez, who arranged manpower got Tk 2.5 lakh; and Juwel received Tk 75,000. The rest of the money was distributed among three others.
Police were able to recover a DB jacket, handcuff, a knife, two motorbikes used in the mugging, and Tk 2.20 lakh from the three arrestees.
“We have details on the other three involved in the incident, and are now conducting drives to arrest them,” said AC Imam.