A 70-year-old registered sex offender from North Platte has pleaded no contest to a new charge of child sexual assault.

Donald Warfield entered the plea Monday in Lincoln County District Court. He is set to be sentenced on May 20.

Prosecutors say a 15-year-old girl reported last year that Warfield began giving her presents and touching her inappropriately when she was about 7 years old. She said the sexual assaults became worse and continued for three or four years.

Warfield was convicted in 2002 of sexually assaulting an 11-year-old.

Court records also show Warfield was arrested last year for failing to properly register as a sex offender. He later pleaded guilty to a misdemeanor count and was sentenced to 30 days in jail.