Authorities say a 15-year-old girl is among several people involved in a prostitution sting in eastern Iowa. The Johnson County Sheriff's Office says the two-day, multi-agency sting involved two women making separate appointments with a law enforcement officer through a prostitution website. The women arrived in Hills on Wednesday with other women who were instructed to perform sex acts with a male subject. One of those passengers was 15. Authorities say five people involved in the sting face various pimping and prostitution charges.