The comments of the Supreme Court represent a track built by how cross-examination systems perform practically. Therefore, the way to make use of the practical understandings may help to clarify the process of present performance and gain further information when the operational problems appear. In terms of practical views and related issues on the procedure of cross-examination, the verdicts made by the Supreme Court may consider as a reference. This article thus collects practical understandings related to cross-examination procedure and explores the existing problems of the performance. This article, based on the views of commentary, gives opinions about practical verdicts and evaluates the weak aspects and doubts of cross-examination performance with a hope to solve some of the unnoticed problems.