Forrest City Police Officer Justin Davis was arrested by Arkansas State Police Special Agents Thursday.
Davis, 22, of Marianna, is charged with two counts of sexual assault (4th degree, felony).
The state police Criminal Investigation Division was requested earlier this week by local authorities to investigate allegations that Davis had been involved in a sexual relationship with a 15 year-old St. Francis County female.
Davis is being held at the Cross County Detention Center.
Bond has been set at $75,000.