In Gallaher v. Superior Court (1980) 103 Cal.App.3d 666, the court stated: "'It is well established that the scope of proper cross-examination may extend to the whole transaction of which the witness has testified, or it may be employed to elicit any matter which may tend to overcome, qualify or explain the testimony given by a witness on his direct examination.' . . ." The court further stated on page 672: "We construe the foregoing criteria as providing, at least ordinarily, that when a prosecution witness testifies to facts tending to establish the guilt of one criminally accused, that witness may be cross-examined on all relevant and material matters preceding, concurring with, or following the criminal event, within his knowledge and reasonably related to the issue of guilt or innocence."