MINNEAPOLIS (AP) — Prosecutors are charging a Minneapolis police officer accused of pressing his knee against George Floyd’s neck with second-degree murder, and for the first time will level charges against three other officers at the scene, a newspaper reported Wednesday.

reported that Minnesota Attorney General Keith Ellison would be upgrading the charge against Chauvin while also charging Thomas Lane, J. Kueng and Tou Thao with aiding and abetting second-degree murder.

Floyd’s family and protesters have repeatedly called for criminal charges against all four officers as well as more serious charges for Chauvin, who held his knee to Floyd’s neck, despite his protests that he couldn’t breathe, and stayed there even after Floyd stopped moving.

Minnesota Gov. Tim Walz said on a National Governors Association call that state Attorney General Keith Ellison, now leading prosecutions in the Floyd case, would make an announcement later Wednesday on the other officers.

Crump and the Floyd family commissioned a separate autopsy that concluded he died of asphyxiation due to neck and back compression due to Chauvin’s knee on his neck and other responding officers’ knees in his back, which made it impossible for him to breathe.