The death of a ground crew worker who was sucked into the engine of Delta Airlines plane at San Antonio International Airport Friday has been ruled a suicide by the Bexar County Medical Examiners Office, KENS5 reports. According to the TV station, 27-year-old David Renner died of blunt and sharp force trauma. Due to the death being ruled a suicide, the National Transportation Safety Board will no longer be opening an investigation into the incident.