Evanston is a suburb of about 74,000 residents located just north of Chicago in Cook County. Child sex trafficking is among the documented problems associated with the local commercial sex market. In April 2014, a nine-month investigation into a case involving an Evanston teen who solicited sex on Craigslist ended with four arrests. The case started in August 2013, when police learned that a 14-year-old boy had posted an ad on the website looking for sex. Police worked with the boy’s parents to discover who had answered the ad. Investigators also used emails, other computer records, and cell phone billing information to determine who replied to the posting. As a result, four Chicago-area men in their 40s and 50s were arrested over four months, at least three of whom were charged with patronizing a minor engaged in prostitution. Their identities were released to the press.