61-year-old William Whitley pleaded guilty to a single count of sex trafficking of a minor. Whitley admitted to paying the 14-year-old girl about $60 to $150 for sex acts with her between June and September 2015. The 27-year police veteran faces a mandatory minimum sentence of 10 years in prison when sentenced in September.Whitley was stripped of his police powers after the federal investigation came to light. FBI investigation into the sex trafficking She said she was introduced to Whitley in June 2015 and had sex with him about five times, collecting between $60 and $150 from him each time.