BALTIMORE, Md. — All charges have been dropped against the officers in the death of Freddie Gray.

Gray was critically injured in the back of a police van in April 2015.

Prosecutors’ decision Wednesday comes after a judge had already acquitted three of the six officers charged in the case, including the van driver and another officer who was the highest-ranking of the group.

A fourth officer had his case heard by a jury, who deadlocked and the judge declared a mistrial.

Prosecutors had said Gray was illegally arrested after he ran away from a bike patrol officer and the officers failed to buckle Gray into a seat belt or call a medic when he indicated he wanted to go to a hospital.

The death added fuel to the growing Black Lives Matter movement and caused turmoil in Baltimore, including large protests and the worst riots the city had seen in decades.

Critics say charges against the officers did not match evidence in the case.