A former neighbor and landlord of the Grays told The Post the teenager came from a neglectful home that, according to police, was frequently visited by the state’s child protective services agency.

The alleged school shooter’s mother, Marcee Gray, who has a lengthy rap sheet with drug and domestic violence busts, is a bit of a black sheep on her side of the family, the relative explained.

Unlike the rest of her kin, she got into the wrong crowd, dated some bad guys and often got into trouble, the family member said.

Lauren Vickers, who lived next door to the Grays in Jefferson, Ga., told The Post the children were always wearing dirty clothes and sometimes were hungry.

This is practically the definition of white trash.

Just because part of the family isn’t trashy doesn’t mean that this particular family unit isn’t.