There’s now a paper trail that shows detailed evidence of former Black Panther Richard Aoki work as an FBI informant. In a report released Friday morning at the Center for Investigative Reporting, reporter Seth Rosenfeld outlines his findings of 221 pages of FBI files that show Aoki’s role as informant with the agency for 16 years, from 1961 to 1977.

Here’s what the records show: The FBI began targeting Aoki while he was still in high school, a striking point that speaks to just how aggressively the government worked to intervene in radical and people of color-led movements. Notably, the files do not detail exactly what information Aoki gave to the FBI, and in particular the redacted documents do not specify whether he informed on the Black Panthers, the political organization with which Aoki is most widely identified. However, the documents do show that Aoki was an informant during the critical years in which the Black Panthers had conflict with the police.

From Rosenfeld’s report: