The jury in the trial of William Porter, a Baltimore police officer charged in connection with the death of Freddie Gray, couldn’t reach a decision, resulting in a mistrial.

They deliberated for three days total and on Tuesday jurors announced that they were deadlocked. The judge sent them back in hopes that they would reach a unanimous verdict after more deliberation.

On Wednesday, the judge declared the mistrial after a hung jury was announced on all charges against Porter, including second-degree assault, involuntary manslaughter, reckless endangerment and misconduct in office charges. He, as well as the other five officers charged, has pleaded not guilty to all charges.