In 2270, Latrobe, Spock, and security guard Bemis crewed an Enterprise shuttlecraft. They sought a top-secret Starfleet weapon hidden in a missing shuttle from the USS Yorktown, which crash landed somewhere on sparsely populated Mevinna. Pyretimite on the class M planet disrupted scanners and communications, forcing flyover searches. Latrobe spotted what looked like a crash site after searching for nearly ten hours. After landing and searching for 15 minutes, Bemis called Latrobe to point out something. Both were suddenly disintegrated as a force field formed directly on top of them. It had been activated by renegade Andorians intent on finding the weapon. (TOS - The New Voyages short story: "The Enchanted Pool")
- While Latrobe was not explicitly identified as a security guard, it was extremely likely given the nature of the mission.