'Banglar Bagh 2', the name sleuths believe is a psuedo name of someone based in Bangladesh's Satkhira district, he said.
In fact, assistance regarding identifying the actual person behind 'Banglar Bagh 2' has been sought from the neighbouring country's Rapid Action Battalion, the officer added.
"This is a fake name and possibly that of a top leader of the JMB," he said.
"Now the question is whether this Bangali Bhai is the same person and has changed his name to Bangalr Bagh...We need to find this out," the officer said, adding that "this will make things pretty easy to understand".
Meanwhile, sleuths have found out that arrested Musiruddin was operating two accounts in two separate banks-one in Tripura and one in Tamil Nadu.
"We have found that regular transactions were made in those two accounts. But the question is how Musiruddin gets to have an account at a bank in Tripura. He is giving us different answers," the officer said.
Tamil Nadu and straightaway went to Esplanade where he bought the sharp-edged weapon and returned to station to board a train to Labhpur.
Acting on an information that he was returning to Kolkata on Monday, CID tracked his movements in the city and arrested him from Burdwan station in the night.
CID sources said NIA sleuths had been keeping an eye on Musiruddin for quite some time.
