MINNEAPOLIS (AP/WXOW) -- Prosecutors have charged a Minneapolis police officer accused of pressing his knee against George Floyd's neck with second-degree murder, and for the first time are leveling charges against three other officers.
Bystander video showing Floyd's May 25 death has sparked protests nationwide and around the world.
The officer, Derek Chauvin, was fired May 26 and initially charged with third-degree murder and second-degree manslaughter.
"First, today I filed an amended complaint that charges former Minneapolis police officer Derek Chauvin with murder in the second degree for the death of George Floyd," Minnesota Attorney General Keith Ellison said. "I believe the evidence available to us now supports the stronger charge of second-degree murder."
Three other officers were also fired but weren't immediately charged. Attorney General Keith Ellison on Wednesday charged the other three officers with aiding and abetting second-degree murder and manslaughter.
The three officers are Thomas Lane, J. Alexander Keung, and Tou Thao.
"We gathered all the facts we could, we reviewed the criminal statutes, we looked at case law, we consulted with each other, and we arrived at these charges. We believe they are justified by the facts and the law," he said.
The head of the state's Bureau of Criminal Apprehension said that as of 3:15 p.m., one of the three officers was in custody. Superintendent Drew Evans didn't specify which one of the three it was. He did say that he expected the other two should be in custody by the end of the afternoon.
ST. PAUL, Minn. (KTTC) -- Minnesota Sen. Amy Klobuchar tweeted that Minnesota Attorney General Ellison is increasing charges against Derek Chauvin, the former Minneapolis officer who knelt on George Floyd's neck.
Klobuchar said the charges will be increased to 2nd degree murder.
Klobuchar also said Ellison is chargin the other three officers.
Ellison is scheduled to make an announcement about the investigation into George Floyd's death on Wednesday afternoon.