I'll go out on a limb and say, though, that there's no way that someone with an ASD diagnosis (vs a degenerative condition or smth similar) could naturally (i.e. without other contributing factors) go from talkative and lively as a child to nonverbal as a young adult. Selectively mute due to social anxiety, perhaps, but not truly 'nonverbal' as parents have claimed. Either they're BSing (wouldn't be the first time lmao) or Lacey simply didn't speak much because what is there to talk about when you have no friends, no acquaintances, in one place all day every day, are likely in constant pain, and only see your parents who clearly don't care a whole lot about you?