They shouldn't.
they should charge the “mother” as well for putting the children in danger by living in a Meth dispensary.
She was visiting - and there's no evidence that any drug dealing actually took place there.
No evidence? After the informant IDed the place, they had an undercover officer make a meth buy there. Did you fail to see that part of the story? I am not surprised. If the media thought they could leave it out, they would. Instead, it is buried.