Memphis police fire sixth officer in Tyre Nichols case

• Preston, who is white, was "departmentally charged and terminated" for several violations, including personal conduct, truthfulness and compliance with taser regulations, Memphis police said in the statement.
• "This is still an ongoing administrative investigation, and multiple MPD officers are under investigation for departmental policy violations," police said. "Updates regarding other actions will be made available in the coming days."

Context: The department had said Monday that Hemphill was relieved of duty on Jan. 8 and that his actions were still under investigation.

• Hemphill had been with the force since 2018.

Of note: Former officers Tadarrius Bean, Demetrius Haley, Emmitt Martin III, Desmond Mills Jr. and Justin Smith, who are all Black men, were each charged with aggravated assault, aggravated kidnapping, official misconduct and official oppression.

• Those officers were "directly involved" in the first and second scene, in which Nichols was "physically abused and suffered serious injuries," police said.

Go deeper: What we know about Tyre Nichols' death after Memphis police traffic stop