Well, it is a common issue for most litigator. The witness seems to be very nervous. What can you do ? One way of course is to "teach" to be calm by answering truthfully. Well fat chance of that. The client may even think you are stupid. Anyway my way is to design an LLM to ask question and based on those answers by the client continue to ask to "test and corner" the client. Here is my program, written in python it instruct the LLM to be a superbarrister and cross-examine the witness. Currently it is using a web-interface but could be better using voice of course. Working on that too.