The witness CW1 is not trustworthy witness. He gave false 161 statement to police, he gave different version on same issue to the Karnataka Human Rights Commission reply to police typed in word document and he signed on the letter under authorized signature. Now he will appear in court to give his statement during cross-examination while contradiction will be pointed out. Further, can I ask him to give his deposition during cross-examination in writing with his signature will the magistrate/PO permit it?