How can a 48 year old mother get away with this?

She is allowing her own son to not attend school between ages 15 and 16 because he informed her, “he’ll get into trouble at school.” He actually did and got expelled from two schools so she decided he can just hang out all day . Why hasn’t she gotten caught? Why hasn’t he gotten caught? Is this legal? And just as surprisingly, The Knights of Columbus just bought them a car and filled it with groceries!