The Memphis Police Department and Tennessee Bureau of Investigation have launched investigations into the action of officers involved in a traffic stop arrest of a man who later died and plan to take “immediate and appropriate action” against them, according to a release from the city.The city’s release said the bureau is looking into the officers’ use of force and the police department is investigating whether agency policy was violated.The police department’s administrative investigation should be finished later this week, according to the news release.“Today, the department is serving notice to the officers involved of the impending administrative actions.”During community protests in Memphis on Saturday, Nichols’ stepfather, Rodney Wells, while standing next to a photo of Nichols in the hospital, told CNN affiliate WMC, “You shouldn’t be on a dialysis machine looking like this because of a traffic stop.”Details about the injuries Nichols suffered or his cause of death have not been released.Memphis Mayor Jim Strickland said, “Make no doubt, we take departmental violation very seriously and, while we must complete the investigation process, it is our top priority to ensure that swift justice is served,” according to the city’s news release."