OMAHA, Neb. (AP) — A 30-year-old man accused of being a serial rapist has been given 90 to 100 years in prison.

Christopher Ennis was sentenced Monday in Omaha. He had faced six counts of sexual assault, one count of attempted sexual assault and one count of strangulation until reaching a deal with prosecutors. He pleaded no contest to two counts of sexual assault.

Prosecutors say Ennis attacked as many as seven women over three years as they walked alone. Ennis is accused of grabbing the women from behind and dragging them behind bushes or buildings before assaulting them. Authorities say Ennis choked one of the women until she was unconscious.

Douglas County Attorney Don Kleine has said a plea agreement was reached so the women would not have to testify at trial.