LINCOLN, Neb. (AP) — A U.S. Department of Justice report says a Nebraska prison records administrator is largely to blame for inmate sentences that were miscalculated.

The report cites poor communication within Nebraska’s prison-records division and inadequate management by its administrator, Kyle Poppert.

The report says many division employees felt that they needed more training, and couldn’t rely on Poppert to answer their questions. It’s based on a dozen interviews with prison employees, including Poppert.

Poppert was suspended without pay for two weeks in August for his role in the sentencing miscalculations, which led to the premature release of hundreds of inmates.

Another employee was also suspended, and two department attorneys retired under threat of being fired. Poppert has not responded to previous interview requests.