Nuovo appello rilasciato per la dispersa scolaretto Kyran Durnin

Can anyone with a legal background explain to me why on earth the mother hasn’t been charged with anything? I understand there’s probably no evidence of murder without a body as proof, but surely they can get her on child neglect or something at the very least? So so so many people let this poor child down massively and literally no one is in jail. I don’t understand it.