KANSAS CITY, Kan. (AP) -- A Kansas City, Kan., man has admitted in federal court that he took a 16-year-old girl across state lines to work as a prostitute.

The U.S. Attorney's office says 26-year-old Otis Warren pleaded guilty Tuesday to one count of transporting a minor for illegal sexual activity. He faces a maximum 30 years in prison at sentencing, scheduled for Sept. 25.

Warren was arrested after undercover police investigators from Prairie Village agreed last November to pay $250 an hour to have sex with the girl. Prosecutors said Warren drove the girl from Kansas City, Mo., to a house in Prairie Village and dropped her off. He was arrested while driving away.

Investigators said the girl worked for Warren, who kept most of the money she earned.