The death of Freddie Gray has been ruled a homicide, ABC News reports.

On Friday morning, State's Attorney Marilyn Mosby announced the charges now facing the six Baltimore police officers connected with the case, ranging from misconduct in office and false imprisonment to second-degree assault, manslaughter and second-degree depraved heart murder. Warrants have been issued for the officers' arrest.

On April 12, the 25-year-old Gray was taken into custody and sustained a spinal injury. During his transport, the officers bound Gray's arms behind his back and put his legs in clamps, but failed to buckle him in. Gray's pleas for medical help were ignored and he failed to receive timely medical attention. A few days later, he went into a coma, and on April 19, one week after his arrest, Gray died.

Mosby revealed that her office's investigation found that Gray's arrest itself had been illegal, since the knife officers found Gray carrying was legal.

Thursday was the third night of Baltimore's 10 p.m.-5 a.m. curfew, instated following protests in response to Gray's death. Mosby plead for demonstrators to protest peacefully and calmly as she continued pursuing the case.

"I heard your call for 'no justice, no peace.' However your peace is sincerely needed as I work to deliver justice on behalf of Freddie Gray," Mosby said.