The story above is about a couple who is being prosecuted for prostituting an autistic teen.
The sources that are named are: the authorities, a criminal complaint filed in Ramsey County, the girl, and the St. Paul Pioneer Press.
Two of the sources, the authorities and the girl, are people and two are records/other sources, the criminal complaint and the Pioneer Press.
The reporter set up all of the attributions at the beginning of the sentence.
Example: The girl told investigators...The St. Paul Pioneer Press says...
It made things clear because it was very obvious where all of the information came from right away.