Missouri Revised Statutes Title XXXV. Civil Procedure and Limitations § 510.300. Instructions

1. At the close of all the evidence, or at such earlier time during the trial as the court may reasonably direct, any party may request that the court instruct the jury in writing on the law applicable to the issues in evidence in the case. Such instructions so requested to be submitted in writing by the party requesting the same, and may be given or refused by the court according to the law and the evidence in the case. The court may also instruct the jury in writing of its own motion. The court shall afford ample opportunity for counsel to examine the instructions before the same are given and to make objections out of the hearing of the jury.

2. Instructions which are refused shall be so marked by the court and filed with the clerk. All instructions given shall be carried by the jury to their room and returned and filed at the conclusion of their deliberations. All instructions refused and all instructions given shall be kept as part of the record of the cause.