On April 12, 2015, Gray, 25, was arrested and died a week later from complications relating to a spinal cord injury after riding in the back of a police van.
Judge Barry Williams granted a request from Officer Edward Nero's lawyers to waive his right to a jury in a pre-trial hearing.
The trials of six Baltimore police officers charged in the death of Freddie Gray are set to resume in May, nearly a year after the 25-year-old died from injuries sustained while in police custody.
