Couldn’t the detainee be the ransom note scammer? The bitcoin connection? It hasn’t been specified that the detainee was connected to the person in the ski mask.
Per Fox:
“Authorities are “going out of their way” to ensure that the public understands that the individual currently detained in connection with Nancy Guthries disappearance is not a suspect:
“Sources making it very clear at this time, in fact, they are going out of their way at this time to make sure that this is not being called an arrest, that this person is not being called a person of interest, that this person is not to be called a suspect, at least for now.”