COLUMBUS — A 54-year-old Columbus man pleaded no contest Wednesday to sexually abusing a vulnerable adult during a period of several weeks last spring.

Platte County District Court Judge Robert Steinke scheduled the defendant for sentencing on March 2. The defendant is not being identified to protect the identity of the 28-year-old developmentally impaired victim.

The sexual abuse charge is a Class 3A felony, punishable by up to three years imprisonment, 18 months of post-release supervision and a $10,000 fine. In exchange for his plea, the prosecution dismissed four other similar sexual abuse counts.

The judge ordered a presentence investigation of the defendant prior to sentencing.

The defendant, who has been in custody since his arrest last spring, was initially charged with first-degree sexual assault and incest.

A Columbus Police investigation began in early May with a report that the victim, who is developmentally delayed with a diminished mental capacity, ran away from the family home, which she shared with her adoptive mother and her adoptive mother's husband.

Investigator Jaymee Levander wrote in her probable arrest statement that the defendant admitted to sexual contact with the victim but denied penile penetration.

The victim was unable to give her address or phone number when officers found and questioned her, authorities reported.