Three Nebraska State Patrol employees are no longer with the force and four others have been disciplined in the wake of a 15-week internal investigation, state officials announced Wednesday.

One trooper was fired, a sergeant resigned and a lieutenant colonel retired, Col. John Bolduc, the patrol superintendent, said during a news conference.

In addition, two officers were demoted: a major reduced in rank to captain and a captain to sergeant. A trooper and sergeant received administrative penalties.

The allegations stemmed from behavioral conduct following two incidents last year.

Bolduc emphasized that all those who were affected by the actions were good people who made mistakes. He declined to name them.

Bolduc, 52, was hired in October to replace Col. Brad Rice, who was fired in June following a probe that found interference with internal affairs investigations and violations of workplace harassment and equal opportunity policies.