Prosecutors say Pecker's actions helped Trump deceive voters in the 2016 election
GM Quader, chairman of the party and deputy leader of the opposition in parliament, signed the appointment on Saturday, the party said in a statement.
Bablu died a week ago from complications related to COVID-19 at the age of 66, prompting the Jatiya Party to announce three days of mourning.
His successor Chunnu, an MP from Kishoreganj, is a former state minister for labour.
Chunnu said Quader informed him about his new position in the party.