Sheikh Hasina needs to face justice for any alleged crime she committed in Bangladesh like anyone else. But it is not for the Supreme Court Bar Council Chairman to demand India to arrest her an extradite her to Bangladesh. That’s not how it works.
What the current government needs to do is urgently organise its crime investigation authority to investigate and gather evidence of crimes she has committed. Then to seek a court warrant for her arrest on the basis of specific alleged crimes. The government then should approach the Indian authorities to arrest and extradite her in the interest of Justice.
This needs to be done as a matter of priority while she still in India. If she finds asylum and leaves India for a western country, for example, she could never be extradited back to Bangladesh to stand trial for any crime, because the western countries would never accept that under the legal system in Bangladesh she would get a fair hearing. Yet India cannot use that excuse. Because Indian and Bangladesh’s legal systems are intrinsically linked and Bangladesh always follows Indian judicial precedents. Furthermore, diplomatically, once India decided that it is in its interest to closely work with the new government (which appears to be the case) it would feel that extaditing Sheikh Hasina to face justice in Bangladesh would be the right thing to do.