Three years after the Justice Department’s internal watchdog slammed the FBI for its failures in the case of convicted sex predator and former U.S. gymnastic team doctor Larry Nassar, an audit released Thursday finds that the bureau is still failing to protect children who have been sexually abused.

The new report by Justice Department Inspector General Michael Horowitz reviewed a sample of 327 cases and found 42 that were so deficient that auditors felt compelled to contact the FBI and urge immediate attention.

In one case, the audit found that a child continued to be sexually abused for 15 months — and another child victim was abused by the same person — while the FBI failed to investigate the case. The IG reported on a separate FBI review that found another such example in which a 2-year-old was being abused for 21 months while the FBI sat on the case and failed to take investigative steps. These cases mirror what happened in the Nassar case, even though FBI Director Christopher Wray assured Congress and the public this would never happen again.

In 47% of the cases examined, the Justice Department watchdog found no evidence that the FBI complied with the mandatory reporting requirements to alert state or local authorities about an allegation of child sexual abuse. In 43% of the cases, the audit found, it wasn’t just a lack of documentation in the file — the FBI needed to take additional investigative steps that should have initially taken place.