A dispute among friends turned deadly in southwest Fresno, leaving one woman dead, a second man missing and another man in custody.
Preston Hemphill, who was not present at the beating, was fired from the Memphis Police Department in February for violating "multiple department policies" during the incident, the department said.
Mexican authorities have requested that a suspect be extradited from the U.S.
Both deputies were found to have failed to report to dispatch or their supervisor that they were on the scene, failed to have their body-worn camera in record mode and failed to report to dispatch they were leaving the scene, the department said in investigative reports.
After five Memphis police officers brutally beat Tyre Nichols last month, one officer took two cell phone photos of the visibly injured 29-year-old Black man and texted one image to at least five people, newly revealed internal police department documents show.
Already, six officers have been fired for their roles in the incident, including five who have been charged criminally with second-degree murder.