The prosecutor calls witnesses whose testimony the prosecutor believes will prove one or more elements of the crime(s) charged. This is called “direct examination.” After the prosecutor has finished questioning a witness, the defense attorney is permitted to ask questions of the witness. This is called “cross-examination.” The purpose of
cross-examination by the defense attorney is to show the jury that the witness has not helped the prosecutor prove the government’s case and, in some situations, has actually helped the defense’s position. Some examples of how
this is accomplished are:
(1.) asking questions to which the answers show that the witness has information favorable to the defense;
(2.) asking questions to which the answers show that the witness is biased against the accused;
(3.) asking questions to which the answers show that the witness is mistaken in his or her beliefs or testimony;
(4.) asking questions to which the answers show that the witness lacks knowledge about key facts of the case;
(5.) asking questions to which the answers show that the witness has either been convicted of a felony or crime that involves making a false statement or acting dishonestly; and
(6.) asking questions to which the answers show that the witness has made a prior inconsistent statement.
After the defense has finished questioning the prosecutor’s witness the prosecutor is permitted to “rehabilitate” the witness; this means the prosecutor may ask questions in an attempt to address some of the damaging points made by the defense. This is called “re-direct."