BALTIMORE -- All six officers charged in the police-custody death of Freddie Gray were indicted by a grand jury, a prosecutor said Thursday.

The indictments were similar to the charges Baltimore State's Attorney Marilyn Mosby announced about three weeks ago. The most serious charge for each officer, ranging from second-degree "depraved heart" murder to assault, still stood.

Gray suffered a critical spinal injury after police handcuffed, shackled and placed him head-first into a van, Mosby has said. His pleas for medical attention repeatedly were ignored, she said.

Mosby said prosecutors had presented evidence to the grand jury for the past two weeks. Some of the charges were changed based on new information, but she didn't say what that new information was. She also did not take questions.

Gray was arrested April 12. He died in a hospital a week later and became a symbol of what protesters say was police brutality against blacks.

Two officers, Edward Nero and Garrett Miller, were indicted on second-degree assault, misconduct in office and reckless endangerment.

Caesar Goodson, who drove the transport van, faces manslaughter and second-degree "depraved heart" murder. Sgt. Alicia White, Lt. Brian Rice and officer William Porter are each charged with manslaughter, second-degree assault, misconduct in office and reckless endangerment.