LINCOLN, Neb. (AP) — A new report finds a $1.5 million effort to reduce staff turnover in Nebraska’s prisons produced mixed results, but corrections officials say the problem would have been worse if lawmakers hadn’t approved the money last year.

The report by the Department of Correctional Services shows a combination of successes and failures in the state’s attempts to keep more experienced workers. Corrections officials submitted the report to lawmakers to document how they spent the funding increase from the 2016 legislative session.

Nebraska’s prison system has faced scrutiny following a series of high-profile incidents, including two deadly inmate uprisings in a two-year period and the escape of two inmates. Critics say many of the problems stem from overcrowding and staffing shortages driven by high employee turnover.