Police arrested former Textiles and Jute Minister Golam Dastagir Gazi from a residence in Shantinagar area under Paltan police station in Dhaka early Sunday.
A message sent from Dhaka Metropolitan Police (DMP) headquarters said a police team conducted a raid in the house and arrested him.
Gazi, chairman of Gazi Group and a former prime minister Sheikh Hasina are among 105 suspects accused in the killing of 17-year-old Roman Mia, a student in tenth grade at Naba Kishaloy High School in Narayanganj.
Gazi was elected as the Awami League candidate for the Narayaganj-1 seat in the 12th parliamentary elections. On Aug 5, after the fall of the government, a Gazi Group factory was attacked and looted in the Ruposhi area of Rupganj.
The former minister has been shown arrested in the case, the DMP said.
