(a) In any criminal prosecution brought by the state of Kansas, no statement or report in the possession of the prosecution which was made by a state witness or prospective state witness, other than the defendant, shall be the subject of subpoena, discovery or inspection until such witness has testified on direct examination at the preliminary hearing or in the trial of the case.

(b) After a witness called by the state has testified on direct examination, the court shall, on motion of the defendant, order the prosecution to produce any statement, as defined in subsection (d), of the witness in the possession of the prosecution which relates to the subject matter as to which the witness has testified. If the entire contents of any such statement relate to the subject matter of the testimony of the witness, the court shall order it to be delivered directly to the defense for examination and use by the defense.

(c) If the prosecution claims that any statement ordered to be produced under this section contains matter which does not relate to the subject matter of the testimony of the witness, the court shall order the prosecution to deliver such statement for the inspection of the court in camera. Upon such delivery the court shall excise the portions of such statement which do not relate to the subject matter of the testimony of the witness. With such material excised, the court shall then direct delivery of such statement to the defense for use by the defense. If, pursuant to such procedure, any portion of such statement is withheld from the defense and the defense objects to such withholding, and the trial is continued to an adjudication of the guilt of the defendant, the entire text of such statement shall be preserved by the prosecution and, in the event the defendant appeals, shall be made available to the appellate court for the purpose of determining the correctness of the ruling of the trial judge. Whenever any statement is delivered to a defense pursuant to this section, the court in its discretion, upon application of the defense, may recess proceedings in the trial for such time as it may determine to be reasonably required for the examination of such statement by the defense and preparation for its use in the trial.

(d) The term “statement,” as used in subsections (b) and (c) in relation to any witness called by the prosecution means:

(1) A written statement made by such witness and signed or otherwise adopted or approved by such witness; or

(2) a stenographic, mechanical, electrical or other recording, or a transcription thereof, which is a substantially verbatim recital of an oral statement made by such witness and recorded contemporaneously with the making of such oral statement.