Razzaq, who is also the Jamaat assistant secretary general, has been living abroad for the past eight months.
But a top Ministry of Home Affairs official said there was no information regarding this.
On Dec 17 last year, five days after Jamaat leader Abdul Quader Molla was hanged for his gruesome crime against humanity during the 1971 Liberation War, Razzaq left Dhaka for the UK.
Since then, the lawyer, who also has British citizenship, is living mainly in London.
Asked about the present state of the defence team without Razzaq, Islam said his absence was making a big difference.
Being a senior Supreme Court lawyer, his argument skills in court cannot be replaced by others, said Islam.
“Our clients are being deprived of his service,” said Razzaq’s colleague.
The Jamaat defence team was formed with Razzaq at its helm, Islam said. It worked following the guidance of a foreign team which comprised British lawyers Steven Kay QC, John Cammegh and Toby Cadman, he added.
“Our team and the foreign team started the defence journey. Before Salauddin Quader Chowdhury was arrested (on war crimes), all the cases were against Jamaat leaders. We defended in each case. Mr Razzaq always worked as the head of the defence team.”
Lawyer SM Shahjahan led the hearing in Jamaat leader Delwar Hossain Sayedee’s case in Razzaq’s absence, while Nazrul Islam is on Mohammad Kamaruzzaman’s war crimes case.
Khandker Mahbub Hossain was in the defence team as a senior in the three cases including Molla’s.
Asked why Razzaq was staying abroad instead of returning and fighting the cases, Tajul Islam said, “Everyone knows that Mr Razzaq never joined any procession and vandalised any cars. He has been implicated in such cases nonetheless. Police have also submitted their report.”
He said these cases meant Razzaq would be harassed if he returns and prevented from doing his job.
The government sued them repeatedly only to harass them, he alleged.
Meanwhile, asked about Islam’s allegations regarding obstructions to Razzaq’s return, Home Ministry’s Additional Secretary Md Shafiqul Islam told bdnews24.com that he had no information regarding the matter.
Lawyer Tajul Islam said no one was currently heading the Jamaat defence team in Razzaq’s absence.
“Khandker Mahbub Hossain is the senior-most lawyer. We respect him as our senior. In case of other issues, all of us are coordinating and working together. There is no one specific team chief,” he added.