It wasn't just Clay County law enforcement there. There was also KCMO Vice and Narcotics in plain clothes among many others. They are all working together. Homeland security was probably even there because of the human trafficking.
Kansas City, Kansas also has a huge presence of street prostitution, I don't know why he would choose to leave them alone. If that's the case, he crossed the Missouri/Kansas state line.
The people in the community need to have a safe and private way to make an official missing persons report. Everyone in that area is afraid to have police at their door or to go into the station. The gang and gun problem is so bad that they'll come shoot up your house with an AK47 and kill your family. So the family's are afraid and I can guarantee the pimps aren't going to file a report. These girls really are alone besides a coworker that probably doesn't even know their real name. It's a dangerous way to live and the girls know that but can't seem to break away.