La. Stat. tit. 13 § 4873
The plaintiff may apply to the court by motion for an order permitting it to withdraw all or any part of the record in an action for the time to be specified in the order, upon leaving with the clerk a signed list of the documents so withdrawn. Documents other than pleading may be withdrawn permanently for use in evidence in any other action, but original documents produced in court or delivered to the clerk by a party in response to a subpoena duces tecum may not be so withdrawn without the consent of such party. The testimony of any witness in an action may be offered in evidence by the plaintiff in any other action between it and the defendant in the action if it appears that such witness has, at the instance or connivance of or in collusion with such defendant, absented or concealed himself.
La. R.S. § 13:4873