"Cross examination" is when a lawyer questions a witness from the opposing side to find out more about their story or to challenge their credibility. Full definition
When they lived, the stories in the NT could be verified by cross examination of those involved, and they were. (religion.blogs.cnn.com)
In general, you can't ask your own witness a leading question, but you may do so toward a hostile witness on cross examination. (law.stackexchange.com)
His diverse experience in litigation has made him an expert in cross examinations, oral arguments and witness preparation. (ropergreyell.com)