From ProPublica:

In violation of a longstanding legal mandate, scores of federal law enforcement agencies are failing to submit statistics to the FBI’s national hate crimes database, ProPublica has learned.

“The lack of participation by federal law enforcement represents a significant and largely unknown flaw in the database, which is supposed to be the nation’s most comprehensive source of information on hate crimes. The database is maintained by the FBI’s Criminal Justice Information Services Division, which uses it to tabulate the number of alleged hate crimes occurring around the nation each year.

“The FBI has identified at least 120 federal agencies that aren’t uploading information to the database, according to Amy Blasher, a unit chief at the CJIS division, an arm of the bureau that is overseeing the modernization of its information systems…’We truly don’t understand what’s happening with crime in the U.S. without the federal component,’ Blasher said in an interview.”

For more info: https://www.propublica.org/article/more-100-federal-agencies-fail-report-hate-crimes-fbi-national-database