A new report by the Washington Post says that a prisoner who was riding in the police van with Freddie Gray believed that he “was intentionally trying to injure himself.”

The Washington Post reported that the unidentified prisoner could not see Gray, but heard him allegedly "banging against the walls" in the van.

Read more from the Washington Post:

The prisoner, who is currently in jail, was separated from Gray by a metal partition and could not see him. His statement is contained in an application for a search warrant, which is sealed by the court. The Post was given the document under the condition that the prisoner not be named because the person who provided it feared for the inmate’s safety.

The document, written by a Baltimore police investigator, offers the first glimpse of what might have happened inside the van. It is not clear whether any additional evidence backs up the prisoner’s version, which is just one piece of a much larger probe.

On April 12, Gray was found unconscious in the van when it arrived at the police station. His spinal cord was "nearly 80 percent severed" and he died a week later. 

Hundreds of angry residents set buildings on fire, looted stores and pelted officers with rocks on Monday during a violent riot after Gray's funeral. 

Both the local police department and the U.S. Justice Department have launched investigations into Gray's death. 

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