A state labor union has filed a complaint against the Nebraska Department of Correctional Services after workers at the Tecumseh prison remain on mandatory 12-hour emergency shifts.

It has been about three months since a riot at the prison left two inmates dead and four injured. Two guard also were injured in the riot.

Nebraska Association of Public Employees Director Mike Marvin says he has made his complaint known directly to Corrections Director Scott Frakes.

Marvin says Corrections can no longer justify forcing employees at Tecumseh to keep working long shifts nearly three months after the deadly riot.

The matter now goes to a public hearing at which Marvin says Corrections must prove an emergency still exists at the prison to justify the mandated, long shifts.