There was a case I saw on a fb video one day where a girl was neglected for seven years, even still in diapers. I believe both her mom and older brother were mentally disabled?

Anyway, she was found and then later adopted. She became severely autistic due to not being held and communicated with as an infant, and I believe she's unable to use language.

It's just really sad. All they needed was some care to become functional humans. I don't understand this either.