A 22-year-old passenger who died after a medical emergency aboard a Southwest Airlines flight bound for Los Angeles has been identified as officials investigate what may have led to his sudden death. Walmsey became unresponsive after experiencing a medical emergency while Flight 958 was en route to Los Angeles, law enforcement sources told NBC Los Angeles. It remains unclear what type of medical emergency Walmsey experienced. In June 2024, 8-year-old Sydney Weston became ill and unresponsive aboard a SkyWest flight before the plane diverted to Peoria, Illinois. That same month, a 41-year-old American passenger died after suffering a severe medical emergency aboard a Fiji Airways flight bound for San Francisco.