OPINION
Thе relators, Weeks Marine, Inc. and Atlantic Sounding Company, Inc. (hereinafter referred to as Weeks Marine), filed an application for writ оf mandamus to compel the trial court to reverse its *390 decision regarding discovery of certain documents. Weeks Marine’s applicаtion arises from a lawsuit brought by the real party in interest, Fidencio Martinez, under the Jones Act. 1 Martinez was a crew member on a vessel allegеdly owned and controlled by Weeks Marine. In his petition, Martinez claimed that he was permanently injured when the vessel struck a stationary object in the water. Martinez sought discovery of certain documents through a motion to compel, and Weeks Marine asserted that the documents wеre privileged.
The trial judge, the respondent in this application, conducted a hearing on Martinez’s motion and Weeks Marine submitted the documents to the trial judge for in camera inspection. After reviewing the documents and hearing arguments from the parties’ lawyers, the trial judge determined that some оf the documents were not privileged; specifically, (1) David Ott’s investigative report, (2) a surveillance report that includes photographs of Martinez, and (3) a surveillance video of Martinez. In response, Weeks Marine filed a motion for emergency relief, and a petition for writ of mandamus, to protect the three documents.
“Mandamus issues only to correct a clear abuse of discretion or the violation of a duty imposed by law when there is no other adequate remedy at law.”
Johnson v. Fourth Court of Appeals,
Rule 192.5 of the rules of civil procedure protects core work product from discovery. The rule defines work product as:
(1) material prepared or mental impressions developed in anticipation of litigation or for trial by or for a party or a party’s representatives, including the party’s attorneys, consultants, sureties, indemnitors, insurers, employees, or agents; or
(2) a communication made in anticipation of litigation or for trial between a party and the party’s representatives or among a party’s representatives, including the party’s attorneys, consultants, sureties, indemnitors, insurers, employees, or agents.
Tex.R.Civ.PROC. 192.5(a) (emphasis added). Applying this definition to the documents in question here, and for the reasons discussed below, we find that the documents are рrivileged.
At the hearing on his motion to compel, Martinez relied on federal substantive law to obtain discovery of David Ott’s report. Martinez explained that federal law governing his cause of action for maintenance and cure imposed a duty upon him to supply medical information that would substantiate his claim. He explained how this duty imposed a correlative duty upon Weeks Marine to investigate his claim. 2 He argued that he was entitled to discovery of the documents in question because Weeks Marine contended that he had not cooperated in thеir efforts to investigate his alleged injury. Although the trial *391 judge did not explicitly reveal his reasons for ordering the discovery of the three documents, his ruling implies that he was persuaded by the argument.
A trial judge presiding over a maritime case in state court must apply federal substantive law, but he must apрly state procedural law.
See Maritime Overseas Corp. v. Ellis,
Like Ott’s report, the surveillance report that includes photographs of Martinez and the video tape are privilеged as work product. The report contains the results of an investigation into Martinez’s background and summarizes surveillance activities. Although the report describes Martinez’s body movements, the report does not reveal any information about the accident or address any of Weeks Marine’s contentions regarding Martinez’s alleged injury. The video reflects additional surveillance of Martinez exiting and re-entering a vehicle. All survеillance and reporting occurred at times subsequent to the date Ott spoke with Martinez’s attorney.
Upon learning that an employee complaining of a work-related injury has hired an attorney, a reasonable defendant would believe a substantial chance of litigation еxisted.
See Flores v. Fourth Court of Appeals,
Notes
. "The Jones Act is a federal statute that provides a remedy to any seamаn who suffers personal injuries in the course of his employment due to the negligence of his employer or the employer's officers, agents, or other employees."
Maritime Overseas Corp. v. Waiters,
. The correlative duties of the parties in a maintenance and cure action are discussed by the First Court of Appeals in its decision in
Maritime Overseas Corp. v. Waiters,
