A cybercrime expert with the Tennessee Bureau of Investigation testified Wednesday that a former Memphis police officer charged in the fatal beating of Tyre Nichols took a cellphone photo of Nichols as he sat on the ground,

Three ex-Memphis police officers are facing state charges including second-degree murder and aggravated assault in the beating death of Tyre Nichols.

After a mixed verdict in federal court, Tennessee prosecutors began presenting their case against three former Memphis officers charged with second-degree murder.