The ED took the legal route because the accused had refused to sign the arrest memo following the questioning at Asansol jail on Thursday. ED counsel Nitish Rana submitted to the court on Friday that the accused was an “influential politician” who collected “illegal gratification” from Enamul Haqueand Sheikh Abdul Latif. Anubrata’s lawyers are all set to challenge ED taking Mandal in custody. “We will challenge the legality of the arrest. The case will come up for hearing on Tuesday,” said Anirban Guha Thakurta, Mandal’s lawyer.